JP5954466B2 - Crimp sheet - Google Patents

Description

  The present invention relates to a pressure-bonded sheet, and more specifically, a base material having a pressure-sensitive adhesive portion is connected at a folding portion or a separation portion, and the base material is folded at the folding portion, overlapped, or cut off at the separation portion. In addition, the present invention relates to a pressure-bonding sheet in which cut substrates are overlapped and are detachably bonded by a pressure-sensitive adhesive portion.

  There is a crimpable sheet on which personal information is printed. This sheet (pressure-bonding sheet) has a pressure-sensitive adhesive applied to at least a part of the substrate constituting the sheet, and the pressure-sensitive adhesive surface is printed with design and personal information, etc. It can adhere | attach so that peeling is possible.

  As described in Patent Documents 1 and 2, the above-mentioned pressure-bonded sheet is used for direct mail, postcards, sealed letters, and the like. In such a pressure-bonding sheet, in order to secure the ease of peeling when the pressure-bonded sheet is opened, a release paper is provided as an adhesion suppressing part at the corner portion where peeling starts or silicone oil is used. By applying, the adhesive strength after pressure bonding was weakened to prevent the substrate from being torn during peeling. In addition, it is shown that when a cutout is provided in a corner of a pressure-bonding sheet and the sheet is folded and peeled off from a stepped portion of the corner, the sheet is easily peeled off.

  However, the provision of the above-described adhesion suppressing portion is a problem because it imposes a large load on manufacturing such as a step of providing release paper or a step of applying silicone oil. In addition, it is conceivable to print and form the above-mentioned adhesion suppressing portion with an ink or the like used when printing and forming a ground pattern or fixed information on the pressure-bonding sheet, but there is no printing of the above-mentioned ground pattern or fixed information. In this case, there is a problem that the adhesion suppressing portion cannot be formed.

  On the other hand, when a notch is provided in a corner, since the adhesive is applied to the base material when the notch is processed with a blade die, the notch is not removed properly, There was a problem of adhering to the pressure-bonding sheet. Furthermore, when it is going to peel off at the step part of the corner notch in the crimped state, it takes time and effort to turn the sheet with the nail, and it cannot be said that it is easy to peel off.

JP 2000-79964 A JP 2005-74997 A

  Therefore, the present invention can conceal personal information etc. using a piece of paper using a peelable adhesive, and when peeling the concealed piece of paper from the pressure-bonding sheet, the piece of paper does not break down, It is another object of the present invention to provide a pressure-sensitive adhesive sheet that does not cause manufacturing problems when the cut-out process is performed on the corner of the pressure-sensitive adhesive sheet without performing adhesion-suppressing printing that prevents the breakage of the paper piece material.

  The above object is achieved by the present invention described below. That is, in the present invention, the base materials having pressure-sensitive adhesive portions are connected at the folding portion or the separation portion, the base materials are folded at the folding portion and overlapped, or cut at the separation portion, and the cut base materials are In the pressure-bonding sheet that overlaps and is detachably bonded by the pressure-sensitive adhesive portion, a triangle-shaped corner cut portion having apexes A, B, and C and having apex B as the corner portion of the base material Natural rubber latex that forms a pressure-sensitive adhesive portion in the vicinity of the edge that sandwiches the obtuse angle of at least the apexes A and C of the corner cut portion in the portion that has been cut off and remains at the corner cut portion. The pressure-sensitive adhesive is thermally deteriorated.

  As a result, the pressure-sensitive adhesive sheet can be easily obtained by using a piece of paper that is a component of the pressure-sensitive adhesive sheet (a part having a pressure-sensitive adhesive portion separated by a folded portion or a separating portion). Can be concealed. In addition, when the concealed paper piece is peeled off from the pressure-bonding sheet, a pressure-sensitive adhesive constituting the pressure-sensitive adhesive portion is located in the vicinity of the edge sandwiching at least the apex A and C of the triangle of the corner cut portion, which is the location where peeling begins. Since it has deteriorated, its adhesive strength is reduced, and the paper piece is easy to peel off without breaking the material.

  Further, the present invention is characterized in that the portion of the pressure-sensitive adhesive that is thermally deteriorated includes a side connecting the vertices A and C. Further, the thermally degraded portion of the pressure-sensitive adhesive includes an extended line portion of the side BC connecting the vertices B and C and an extended line portion of the side AB connecting the vertices B and A. It is characterized by. Thereby, the location where the pressure-sensitive adhesive deteriorates spreads, and the material breakage prevention property of the paper piece when peeling the concealed paper piece from the pressure-bonding sheet can be further enhanced.

  As described above, in the present invention, a piece of paper that is a constituent element of a pressure-bonding sheet (a part separated from a folded part or a cut-off part in a base material having a pressure-sensitive adhesive part) is formed into a pressure-sensitive adhesive part. Adhering with a pressure adhesive to conceal information, when peeling the concealed paper piece from the pressure-bonded sheet, conduct heat generated by laser irradiation at the time of forming the corner cut portion, at least the triangle of the corner cut portion The pressure-sensitive adhesive composing the pressure-sensitive adhesive part near the sides sandwiching the obtuse angle of the vertices A and C is thermally deteriorated, the adhesive force between the pressure-sensitive adhesives is reduced, and the material breakage of the paper piece when peeling is prevented. ing. When processing a corner cut part on a pressure-bonded sheet, it is not a method of processing with a blade type, but it is processed in a non-contact manner with the object by laser irradiation. There is no problem that debris removed due to the effect of the remaining agent adheres to the pressure-bonded sheet.

  In addition, since the cutting of the notch is performed by laser irradiation, that is, processing is performed by electronic control of the controller of the laser processing machine including laser irradiation, the processing position and the processing size are not constant, The setting can be changed freely, and the design of the position of the corner cut can be changed freely, which is very practical.

  The pressure-sensitive adhesive sheet of the present invention has the above-described configuration, and utilizes a piece of paper using a peelable adhesive (a part separated from a folded part or a cut-off part in a base material having a pressure-sensitive adhesive part). It was possible to conceal personal information and the like, and when the concealed paper piece was peeled off from the pressure-bonding sheet, it was possible to prevent the paper piece from breaking.

It is a top view which shows one embodiment which is a crimping | compression-bonding sheet | seat of this invention. It is a general | schematic fragmentary sectional view containing the corner cut part of the crimping | compression-bonding sheet shown in FIG. It is a top view which shows other embodiment which is a crimping | compression-bonding sheet | seat of this invention. It is the schematic which showed several examples of the heat deterioration area | region of the pressure sensitive adhesive of the corner cut part of the crimping | compression-bonding sheet | seat of this invention. It is the schematic which shows an example of the laser processing apparatus used in the case of formation of the corner cut part applied with the manufacturing method of a crimping | compression-bonding sheet.

  Next, embodiments of the present invention will be described in detail. The pressure-sensitive adhesive sheet and the manufacturing method thereof shown in the following embodiments are also examples of the present invention.

  FIG. 1 is a plan view showing an embodiment of a pressure-sensitive adhesive sheet according to the present invention. FIG. 1 (1) shows a folded state of a pressure-sensitive adhesive sheet 1 in which a base material having a pressure-sensitive adhesive part is connected by a folding part 2. FIG. 2 is a schematic plan view of the pressure-bonding sheet showing a state before being formed, and both ends of the pressure-bonding sheet are processed with a marginal punch 7 for use as a pin feed in conveyance of a printer or the like used in post-processing. . The folding part 2 is in the center of the pressure-bonding sheet, and in the base material having the pressure-sensitive adhesive part, the part separated from the folding part 2, that is, the paper piece 9 and the paper piece 10 are adjacent to each other.

  In FIG. 1 (1), there is a display section 6 of “postcard” on the surface of the pressure-bonding sheet 1 on which the pressure-sensitive adhesive portion is provided. The illustrated pressure-bonding sheet 1 is folded at the folding portion 2 as shown by an arrow so that the pressure-sensitive adhesive portions of both the paper piece 9 and the paper piece 10 are in contact with each other. It becomes a form as shown in 2).

  In FIG. 1 (1), as shown in the partially enlarged view at the corner of the paper piece 10, it has a corner cut portion 3 of a triangle (ΔABC) composed of vertices A, B, C, that is, the vertex A , B, and C, and has a triangular corner cut portion 3 with the apex B as the apex that forms a right angle of a right triangle, and the pressure sensitive adhesive portions of both the paper piece 9 and the paper piece 10 are It is folded so that it touches, and it becomes a form as shown in FIG. Further, when the postcard is used as a postcard, the end including the marginal punch 7 is cut (sheet cut) and discarded. In order to make it easier for the person who received and delivered the postcard in the form of the cut postcard to peel off the postcards 9, 10 of the postcard that has been adhered by the pressure-sensitive adhesive section, the corner cut is placed at the position where the postcard is first peeled off. Part 3. That is, in the corner cut portion 3, the paper pieces are not bonded to each other, only one of the paper pieces remains, and pressure sensitivity in the vicinity of the sides sandwiching the obtuse angles (α, β) of the apexes A and C of the corner cut portion 3. Since the adhesive has deteriorated (see FIG. 4), the adhesive force between the pressure sensitive adhesives is reduced, and it is easy to peel off. FIG. 1 shown above is a two-fold type pressure-bonding sheet.

  FIG. 2 is a schematic cross-sectional view of the pressure-sensitive adhesive sheet shown in FIG. 1A cut along XX. In the base material 4 having the pressure-sensitive adhesive portion 5, the corner cut portion 3 is provided at the corner position. Then, the pressure-sensitive adhesive portion in the vicinity of the side sandwiching the obtuse angle of vertices A and C, which is the position where the crimped sheet is folded and bonded in the form of a postcard, and starts to peel off the bonded portion around the corner cut portion 3 The pressure sensitive adhesive of 5 has deteriorated. In the figure, the deteriorated region is easy to understand, and is clearly separated from the hatched portion indicating the region of the pressure-sensitive adhesive portion 5 and is indicated by the dashed hatched portion. However, the heat generated by laser irradiation is conducted, and the corner cut portion 3 The pressure-sensitive adhesive in the vicinity 8 (hereinafter referred to as the periphery of the corner cut portion) sandwiching the obtuse angles of the vertices A and C is a region where the pressure-sensitive adhesive is thermally deteriorated, and the boundary with the non-deteriorated region is linear (planar I don't think it is.

  The heat-degraded region of the pressure-sensitive adhesive in the periphery 8 of the corner cut portion 3 shown in FIG. 2 can be changed in size by changing, for example, the laser beam diameter and power under laser irradiation conditions. Even if there is a difference in size, the pressure-sensitive adhesive around the corner cut part is thermally deteriorated, so the adhesive force between the pressure-sensitive adhesives is reduced, making it easier to peel off. It prevents torn pieces of paper around the area.

  FIG. 3 is a plan view showing another embodiment of the pressure-sensitive adhesive sheet according to the present invention. FIG. 3 (1) shows that a substrate having a pressure-sensitive adhesive portion is connected by a fold portion 2 and a fold portion 2 ′. FIG. 2 is a schematic plan view of a pressure-bonding sheet showing a state before the pressure-bonding sheet 1 is folded; both ends of the pressure-bonding sheet are provided with marginal punches 7 for use as pin feeds for conveyance of a printer or the like used in post-processing. Processing has been applied. The paper piece 9, the paper piece 10, and the paper piece 11 are sequentially adjacent to each other with the folding part 2 and the folding part 2 'as a boundary.

  In FIG. 3 (1), there is a “postcard” display section 6 on the surface of the pressure-bonding sheet 1 on which the pressure-sensitive adhesive section is provided. The illustrated pressure-bonding sheet 1 is folded at the folding part 2 so that the pressure-sensitive adhesive parts of both the paper piece 9 and the paper piece 10 are in contact with each other as indicated by an arrow, and is further indicated by an arrow at the folding part 2 ′. In addition, the pressure-sensitive adhesive portions of both the paper piece 10 (adhered to the paper piece 9) and the paper piece 11 are folded, overlapped, and bonded so as to form as shown in FIG. 3 (2). This form is a so-called tri-fold (Z-fold) type pressure-sensitive sheet (postcard).

  In FIG. 3, a corner cut portion 3 of a triangle (ΔABC) composed of vertices A, B, and C is provided at the corner of the paper piece 11 so that the pressure-sensitive adhesive portions of both the paper piece 9 and the paper piece 10 are in contact with each other. It is folded and overlapped so that the pressure-sensitive adhesive portions of both the paper piece 10 (adhered to the paper piece 9) and the paper piece 11 are in contact with each other to form a shape as shown in FIG. Further, when used as a postcard, both ends including the marginal punch 7 are cut (sheet cut) and discarded. In order to make it easier for the person who received and delivered the postcard in the form of the postcard after the cut to peel off the postcards 10 and 11 of the postcards that have been adhered to each other by the pressure-sensitive adhesive section, Part 3. That is, in the corner cut portion 3, the paper pieces are not bonded to each other, and only one of the paper pieces remains, and the pressure-sensitive adhesive near the sides sandwiching the obtuse angles of the apexes A and C of the corner cut portion 3 deteriorates. As a result, the adhesive strength between the pressure sensitive adhesives is reduced, making it easy to peel off.

  Moreover, FIG. 4 is the schematic which showed several examples of the heat degradation area | region of the pressure sensitive adhesive of the corner cut part of the crimping | compression-bonding sheet | seat of this invention. In FIG. 4 (1), the region parallel to the continuous line from side to side of the side AC that has been cut off by ΔABC of the corner cut portion 3 is the heat-degraded region 8 of the pressure-sensitive adhesive. The pressure-sensitive adhesive on the side AC that is the side that sandwiches the obtuse angle α of the apex A of the triangle ABC is deteriorated, and the pressure-sensitive adhesive on the extension line of the side AB that is the side that sandwiches the obtuse angle α of the apex A of the triangle ABC is It is deteriorated at the position of the width L. Similarly, the pressure-sensitive adhesive of the side AC that is the side that sandwiches the obtuse angle β of the vertex C of the triangle ABC has deteriorated, and the pressure sensitivity on the extension line of the side BC that sandwiches the obtuse angle β of the vertex C of the triangle ABC. The adhesive is deteriorated at the position of the width M.

  In FIG. 4 (2), the portion of the corner cut portion 3 that has been cut off by ΔABC and remains and is a certain length (N) from A of the side AC that is the side sandwiching the obtuse angle α of the vertex A of the triangle ABC. Along the line 8 and along the width O on the extended line of the side AB, the pressure-sensitive adhesive portion 8 is deteriorated. Further, the location of the pressure-sensitive adhesive along a certain length (P) from C of the side AC, which is the side sandwiching the obtuse angle β of the vertex C of the triangle ABC, and along the width Q on the extension line of the side BC 8 has deteriorated.

  In FIG. 4 (3), a region parallel to a continuous line from side to side of the side AC that is cut off by ΔABC of the corner cut portion 3 is the heat-degraded region 8 of the pressure-sensitive adhesive. Further, the pressure-sensitive adhesive on the extension line of the side AB, which is the side sandwiching the obtuse angle α of the vertex A of the triangle ABC, is deteriorated at the position of the width R. Similarly, the pressure-sensitive adhesive of the side AC that is the side that sandwiches the obtuse angle β of the vertex C of the triangle ABC has deteriorated, and the pressure sensitivity on the extension line of the side BC that sandwiches the obtuse angle β of the vertex C of the triangle ABC. The adhesive is deteriorated at the position of the width S. Although three examples are shown in FIG. 4, the present invention is not limited to this example, and in order to make it easy to peel off the pieces of paper of the pressure-bonded pressure-bonded sheet by the pressure-sensitive adhesive portion, the region deteriorated by heat, that is, the adhesive property It suffices if a region that suppresses this is provided.

  In FIGS. 1 and 3 described above, the base material having the pressure-sensitive adhesive portion is that of the pressure-bonding sheet connected by the folding portion 2, but not limited thereto, the base material having the pressure-sensitive adhesive portion. However, it may be a pressure-bonding sheet that is connected at the cut-off portion, cut off at the cut-off portion, and overlapped so that the pressure-sensitive adhesive portions are in contact with each other at the cut-off bases. When the overlapping pieces are bonded together, the cut pieces of paper can be easily aligned if the ends of the cut portions are aligned.

Below, the element which comprises the crimping | compression-bonding sheet | seat of this invention is demonstrated in detail.
(Base material)
Examples of the base 4 of the pressure-bonded sheet include high-quality paper, art paper, coated paper, cast-coated paper, synthetic resin or emulsion-impregnated paper, synthetic rubber latex-impregnated paper, synthetic resin-incorporated paper, and cellulose fiber paper. Alternatively, a film (so-called synthetic paper) having fine voids (microvoids) inside the substrate can be used.

  However, it is necessary to perform predetermined printing on the pressure-bonding sheet and to secure a predetermined thickness capable of forming the corner cut portion by laser irradiation. For example, a thickness of 20 to 300 μm is preferable. Among the above substrates, papers are particularly preferable. This is because the folding ability and adhesion suitability when the pressure-sensitive adhesive part is adhered by folding at the folding part are good.

(Pressure-sensitive adhesive part)
The pressure-sensitive adhesive part 5 is adjusted so that the pressure-sensitive adhesive part does not adhere even if the pressure-sensitive adhesive part to be used contacts with the base material, and is bonded only after the pressure-sensitive adhesive parts come into pressure contact with each other, and can be peeled again. However, in the pressure-sensitive adhesive sheet of the present invention, the generated heat is conducted by the heat of laser irradiation, and the pressure-sensitive adhesive constituting the pressure-sensitive adhesive portion is thermally deteriorated. And the adhesive force of pressure sensitive adhesives falls by the thermal degradation. Since the part directly irradiated by laser irradiation is cut and removed in the above-mentioned thermally deteriorated region, in detail, the remaining part adjacent to the part removed by laser irradiation is adjacent to the part irradiated by laser irradiation. Yes, the laser irradiation conditions (beam diameter, power, scanning speed, etc.) and the type of pressure-sensitive adhesive used change the physical properties (such as reduced adhesive strength) due to heat, and the pressure-sensitive adhesive part The region varies.

  As said pressure sensitive adhesive, the adhesive main ingredient demonstrated below and the thing containing a filler can be used. Adhesive agents include natural rubber latex obtained by sulfur-free vulcanization of natural rubber and mixed with methyl methacrylate, and natural rubber latex obtained by graft copolymerization of methyl methacrylate and styrene monomer. Can be mentioned. This natural rubber latex deteriorates due to the influence of heat generated by laser irradiation. This deterioration means that the property and state of the pressure-sensitive adhesive change before and after the laser irradiation, and the adhesive force between the pressure-sensitive adhesives decreases.

Degradation due to heat of the above pressure-sensitive adhesive is because the crosslink density of natural rubber is changed by the heat generated by laser irradiation, or because oxygen penetrated into natural rubber reacts to cause oxidation. It is considered that the adhesive strength of the resin decreases.
Examples of the filler contained in the pressure-sensitive adhesive include clay, calcite-based precipitated calcium carbonate forming primary or secondary aggregates, and aragonite-based precipitated calcium carbonate forming secondary aggregates. , Calcium carbonate, styrene beads, silica, synthetic fine particle silica, amino surface modified silica, wax surface treated silica, spherical silica, ordinary calcium, metal oxides such as zinc, magnesium, aluminum or titanium, hydroxides, Examples thereof include carbonates, silicates, and mixtures thereof. Preferred are clay and calcium carbonate.

In the pressure-sensitive adhesive, the above-mentioned adhesive main agent, filler, and other additives such as a dispersant and a printability improver can be used in combination according to the purpose.
The pressure sensitive adhesive can be applied to the substrate by a conventionally known coating method. For example, it is applied by a general coater such as an air knife coater, roll coater, blade coater, rod blade coater, bar coater, die coater, etc., but the coating amount is in the range of ³ to 15 g / m ² in terms of solid content. It is desirable to be adjusted. If the coating amount is less than 3 g / m ² , the desired adhesive force cannot be obtained, and unintended peeling tends to occur. If the coating amount exceeds 15 g / m ² , the adhesive force becomes too strong and may peel off. It becomes impossible, or adhesive wrinkles adhere to the coating roll at the time of coating, and operational and quality problems are likely to occur.

  Referring to FIGS. 1 and 3, personal information recorded on the pressure-bonded sheet is folded at the folding portion 2 of the pressure-bonded sheet 1, and the pressure-sensitive adhesive portions on the surface of the paper piece 10 and the paper piece 11 are overlapped and bonded together. Can be concealed. Although not shown in the figure, the pressure sensitive adhesive part of the base material is used to prevent the personal information written or filled in on the surface of the base material from being seen through during handling such as mail delivery. It is preferable that the tint block printing is performed on the surface opposite to the surface on which the surface is provided or between the base material and the pressure-sensitive adhesive portion.

Below, the manufacturing method of a crimping | compression-bonding sheet is demonstrated.
The pressure-sensitive adhesive part 5 and the display part 6 are formed on the base material of the pressure-bonding sheet. The order in which the pressure-sensitive adhesive portion 5 and the display portion 6 are formed is not particularly limited. In addition, when obtaining what applied the pressure-sensitive adhesive part to one whole surface of a base material, formation of a display part will be performed later. The display portion is formed by printing such as gravure printing or offset printing, or when recording variable data such as personal information on a pressure-bonding sheet with a printer such as inkjet recording or electrophotographic recording. It is also possible to perform recording for displaying a “contact card” or the like.

  Next, a folding part or a separation part is formed at a predetermined position of the pressure-bonding sheet by sewing. In that case, it is preferable for mass production to use a continuous sheet base material in a continuous manner in a long form, and a marginal punch 7 is provided at both ends in the conveying direction of the continuous sheet. Further, it is preferable to punch and process the marginal punch by attaching a pin and a die and rotating the roll with the base material interposed therebetween.

  Next, the base material (including the pressure-sensitive adhesive portion) is cut by laser irradiation at a predetermined position that is a corner of the base material to form a corner cut portion. The corner cut portion has a triangular (ΔABC) shape, and the base material connected at the folding portion or the separation portion is folded at the folding portion, overlapped, or cut at the separation portion, and the cut base materials are The position of the corner cut portion is determined from the form of the pressure-bonding sheet that is overlapped and bonded by the pressure-sensitive adhesive portion, corresponding to the position at which the paper pieces start to be peeled off.

  During the laser irradiation of the process formed by the above corner cut, the heat generated by the laser irradiation is conducted and the pressure sensitive adhesive around the corner cut part is thermally deteriorated, and the adhesive force between the pressure sensitive adhesives Is reduced. At that time, by changing the laser beam diameter, power, and the like of the laser irradiation conditions, the size of the heat-degraded region of the pressure-sensitive adhesive in the corner cut portion as shown in (1) to (3) of FIG. The shape can be changed.

(Cutting by laser irradiation)
As the laser irradiation means, YAG laser, carbon dioxide laser, ruby laser, etc. are used as laser light, and in particular, YAG laser has a short wavelength and can be focused on a minute spot, so finer processing is possible. Preferably used. The object can be cut with an arbitrary shape and size by the laser irradiation means, and the corner cut portion can be processed.

  An example of the laser irradiation means applied in the present invention will be described. First, the laser light is condensed by a lens, and the printed material is irradiated onto the surface of the substrate. At that time, by adjusting the laser light irradiation conditions (beam diameter, power, scanning speed, etc.), the size of the corner cut can be controlled, and the thermal degradation of the pressure-sensitive adhesive around the corner cut. The size of the area to be adjusted can also be adjusted. As described above, in the present invention, by performing laser irradiation, processing can be easily performed with high accuracy, good reproducibility, and without contact with the pressure-bonding sheet.

  The laser irradiation means of the present invention preferably uses a laser beam in an infrared region of about 0.9 to 11 μm, and the portion irradiated with the laser light is heated. The portion irradiated with the laser light is locally heated and cut by blowing off the portion in the liquid phase in a state exceeding the melting point of the portion.

  Such cutting by laser irradiation can be performed by a laser processing apparatus described below. As shown in FIG. 5, the laser processing apparatus includes a laser oscillator 20 including a laser head 21, a processing optical system (lens) 22, and a laser power source 23, and a pressure-bonding sheet 30 that is a workpiece. The XY table 24 that can move in the horizontal plane (in the XY plane), the Z table 25 that moves the laser head 21 and the processing optical system (lens) 22 in the vertical direction (Z-axis direction), and the horizontal plane of the XY table 24 A main controller 26 is provided for automatically or manually controlling the moving operation, the vertical moving operation of the Z table 25 and the oscillation operation of the laser oscillator 20. Under such control of the main controller of the laser processing apparatus 15, the corner cut portion 3 can be formed at the position and size as shown in FIGS. A detection mark is formed on the end of the crimp sheet or the end of the product in the middle of manufacturing the crimp sheet, although it does not exist on the end of the crimp sheet, and the detection mark is cut by laser irradiation. It can be used as a detection signal for starting

(Detection mark)
In processing of the corner cut part by laser irradiation in the manufacturing method of the pressure-bonding sheet, since it is necessary to process all in a predetermined place, a detection mark is formed on the pressure-bonding sheet in advance, the mark is detected, and the laser is detected. It is preferable to adjust the irradiation position. This detection mark is formed at the same time as or immediately after the formation of the display portion, and is used as a reference for subsequent cutting by laser irradiation.

  The shape and color of the detection mark are not limited as long as it can be detected by the detector. Further, the position of the detection mark can be set so as not to adversely affect the use of the pressure-bonding sheet. The shape of the detection mark may be, for example, an ellipse, a rectangle, or other shapes such as a round shape and a barcode. The color of the detection mark only needs to be detectable by a detector. For example, in the case of a light transmission type detector, silver or black having high concealment properties may be used. Further, in the case of a light reflection type detector, a highly glossy metallic luster color tone and the like can be given. Examples of the detection mark forming method include a recording method using a printer such as inkjet recording and electrophotographic recording, a gravure printing method, and an offset printing method.

Although the crimping sheet of the present invention has been described with a focus on the use of postcards, it is not limited to the use of postcards, but handouts such as questionnaires are distributed, and then the completed forms are collected and used. It can also be applied to applications.

DESCRIPTION OF SYMBOLS 1 Crimp sheet 2 Folding part 3 Corner cut part 4 Base material 5 Pressure-sensitive adhesion part 6 Display part 7 Marginal punch 8 Thermal degradation area 9, 10, 11 Paper piece 15 Laser processing apparatus 20 Laser oscillator 21 Laser head 22 Processing optical system 23 Laser Power supply 24 XY table 25 Z table 26 Main controller 30 Crimp sheet

Claims (3)

  The base material having the pressure-sensitive adhesive portion is connected at the folding portion or the separation portion, and the base material is folded at the folding portion and overlapped, or cut at the separation portion, and the cut base materials are overlapped with each other. In the pressure-bonding sheet that is detachably bonded by the bonding portion, a part of the base material includes vertices A, B, and C, and has a triangular corner cut portion having the vertex B as a corner portion of the base material, A pressure-sensitive adhesive comprising a natural rubber latex as an adhesive main component that constitutes a pressure-sensitive adhesive portion in the vicinity of an edge that sandwiches at least the obtuse angle of the apexes A and C of the corner cut portion at a portion that remains after being cut off at the corner cut portion A pressure-sensitive adhesive sheet characterized by heat degradation.   2. The pressure-sensitive adhesive sheet according to claim 1, wherein the thermally degraded portion of the pressure-sensitive adhesive includes a side connecting the vertices A and C. 3. The heat-degraded portion of the pressure-sensitive adhesive includes an extended line portion of the side BC connecting the vertices B and C and an extended line portion of the side AB connecting the vertices B and A. The pressure-bonding sheet according to claim 2.

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