JP6649114B2 - Laminated adhesive sheet - Google Patents

Description

  The present invention relates to a laminated adhesive sheet in which laminated pieces are laminated and adhered by an adhesive layer which can be peeled later.

  In recent years, adhesive sheets that have been peelably laminated and adhered have become widely used for forms, sealed letters, postcards, pamphlets, booklets, and the like. It has become to. In particular, in the case of a laminated adhesive sheet having two or more surfaces, the peel strength (adhesive strength) of one laminated piece and the peel strength (adhesive strength) of another laminated piece are substantially equal when each of a plurality of laminated pieces is peeled. Is preferred.

  Conventionally, various superimposed adhesive sheets for recognizing information or the like by peeling and opening later are widely known, and are widely known to be applied to, for example, pressure bonding postcards described in Patent Document 1.

  Here, FIG. 6 shows an explanatory view of a conventional crimped postcard. In FIG. 6A, a first piece 102, a second piece 103, and a third piece 104, which constitute a pressure-bonded postcard, are continuously provided along a folding line 105, and peeled off on one surface of the first piece 102 and the second piece 103. The first adhesive layer 111A is formed by a possible adhesive, and the second adhesive layer 111B is formed on the other surface of the second piece 103 and the third piece 104 by the same peelable adhesive.

  Then, as shown in FIG. 6B, the first piece 102 is folded on the second piece 103, and the third piece 104 is folded on the second piece 103 and pressure-bonded, as shown in FIG. 6C. A crimped postcard 101 as shown is produced.

JP-A-04-208498

  Incidentally, the formation of the first adhesive layer 111A and the second adhesive layer 111B shown in FIG. 6A is not performed by one forming unit, but is performed by different forming units even with the same mechanism. A peelable adhesive is applied to one surface of the first piece 102 and the second piece 103 in the forming unit and dried to form the first adhesive layer 111A, and then the second piece 103 and the third piece 103 in the other forming unit. The same adhesive is applied to the other surface of the piece 104 and dried to form the second adhesive layer 111B.

  That is, when the first adhesive layer 111A is formed in a predetermined forming unit and then the second adhesive layer 111B is formed in another forming unit, even if the applied thickness of the adhesive is set to be the same, different units may be used. 6C, since the drying process in the subsequent process affects the first adhesive layer 111A on the other surface, as shown in FIG. 6C. The adhesive strength (peeling force) of the adhesive layer 112 between the first adhesive layers 111A between the second piece 103 and the second piece 103, and the adhesive strength of the adhesive layer 113 between the second adhesive layers 111B between the second piece 103 and the third piece 104 The force (peeling force) is not the same even if the same adhesive is used and the coating thickness is set to the same value. On the other hand, since the pressure bonding is performed at one time, the pressure between the adhesive layers cannot be controlled. Quality control that eliminates adhesive differences There is a problem that it is difficult to perform.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a superposed adhesive sheet that suppresses a difference in adhesive force between a plurality of laminated pieces and facilitates quality control.

In order to solve the above problem, in the invention of claim 1, a non-re-adhesive first adhesive layer having a thickness (a) is formed on substantially the entire first surface which is the lower surface of the laminated upper piece, A non-re- attachable second adhesive layer having a thickness (b) is formed on substantially the entire second surface , which is the upper surface of the laminated piece, with a thickness (b), and is formed on substantially the entire third surface , which is the lower surface of the laminated piece. peelable non re-adhesive third adhesive layer is formed to a thickness (c), the fourth surface substantially entire surface peelable non re-adhesive of the fourth adhesive layer is thick, which is the upper surface of the laminate lower piece ( d), the first surface of the laminated upper piece and the second surface of the laminated middle piece are superposed surfaces, and the third surface of the laminated middle piece and the fourth surface of the laminated lower piece are A superimposed adhesive sheet that is releasably adhered to the superposed surface,
The relationship between the thicknesses,
a: b ≠ 1: 1 (1)
c: d ≠ 1: 1 (2)
a + b ≒ c + d (3)
The configuration is as follows.

According to the second aspect of the present invention, the plurality of laminated pieces are laminated and non-re- attached in a releasable manner and adhered to the second surface when the entire laminated piece is a single laminated piece. In addition to the formed second adhesive layer and the third adhesive layer formed on the third surface, the first intermediate adhesive having a peelable thickness (c1) opposed to each of the superposed surfaces between the laminated pieces. Each of the layer and the second intermediate adhesive layer having a thickness (c2) is formed and adhered to substantially the entire surface, and the relationship between the thicknesses of the first intermediate adhesive layer and the second intermediate adhesive layer is as follows :
c1: c2 ≠ 1: 1
a + b ≒ c1 + c2
The configuration is as follows.

According to the invention of claim 1, the laminated upper piece, the laminated piece and the laminated lower piece are releasably overlapped and adhered, and can be peeled on substantially the entire first surface which is the lower surface of the laminated upper piece. A non-re-adhesive first adhesive layer is formed at a thickness (a), and a non-re-adhesive second adhesive layer capable of being peeled over substantially the entire second surface , which is the upper surface of the piece being laminated, is formed at a thickness (b). And forming a non-re-adhesive third adhesive layer having a thickness (c) on substantially the entire third surface , which is the lower surface of the laminated piece, with a thickness (c) . A non-re-adhesive fourth adhesive layer having a thickness (d) is formed on substantially the entire surface, and the relationship between the thicknesses is a: b ≠ 1: 1 (1), c: d ≠ 1: 1 (2). , A + b ≒ c + d (3), it is possible to suppress the occurrence of a difference in adhesive force between the laminated pieces, and to facilitate quality control. It is intended.

According to the invention of claim 2, the pieces during lamination are formed on the second surface as a single piece during lamination as a whole by assembling and bonding a plurality of laminated pieces in a non-re-adhesive and peelable manner. In addition to the formed second adhesive layer and the third adhesive layer formed on the third surface, the first intermediate adhesive layer having a peelable thickness (c1) opposed to each of the superposed surfaces between the laminated pieces, and Each of the second intermediate adhesive layers having a thickness (c2) is formed and adhered to substantially the entire surface, and the relationship between the thicknesses of the first intermediate adhesive layer and the second intermediate adhesive layer is represented by c1: c2 {1: 1, a + b}. By adopting the configuration of c1 + c2 , it is possible to suppress the occurrence of a difference in the adhesive force between the laminated pieces even for a multi-piece laminated adhesive sheet, and to facilitate quality control. is there.

BRIEF DESCRIPTION OF THE DRAWINGS It is sectional drawing of one Embodiment of the superposition | adhesion adhesive sheet based on this invention. It is explanatory drawing of the manufacturing process of the laminated adhesive sheet of FIG. 1 (A). It is explanatory drawing in the case of applying the superposition | adhesion adhesive sheet which concerns on this invention to a reciprocating postcard. It is explanatory drawing (1) of the manufacturing process of the reciprocating postcard of FIG. It is explanatory drawing (2) of the manufacturing process of the reciprocating postcard of FIG. It is explanatory drawing of the conventional crimping postcard.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In each of the cross-sectional views in this embodiment, dimensions (particularly, thickness) are ignored for easy understanding.

  FIG. 1 shows a cross-sectional configuration diagram of an embodiment of the superposed adhesive sheet according to the present invention. FIG. 1 (A) shows a laminated adhesive sheet 11 composed of a laminated upper piece 12, a middle laminated piece 13 and a laminated lower piece 14 of sheet pieces such as paper. A first adhesive layer 21A is formed on a certain first surface, a second adhesive layer 22A is formed on a second surface, which is the upper surface of the laminated piece, and a third adhesive layer is formed on the third surface, which is the lower surface of the laminated piece. 21B is formed, and a fourth adhesive layer 22B is formed on the fourth surface, which is the upper surface of the lower laminated piece.

  The first adhesive layer 21A, the second adhesive layer 22A, the third adhesive layer 21B, and the fourth adhesive layer 22B are each formed of the same peelable adhesive, and the adhesive is an aqueous emulsion-based adhesive. An adhesive or an adhesive varnish (for example, an ultraviolet curable varnish) is used, and is the same as that used for a conventional pressure-bonded postcard or the like. The adhesive layer made of an aqueous emulsion adhesive and the adhesive layer made of an adhesive varnish are not mixed. In this case, the peelable adhesives used in the first adhesive layer 21A, the second adhesive layer 22A, the third adhesive layer 21B, and the fourth adhesive layer 22B have the same components and the same weight ratio. Apparently, the adhesive strength (the peel strength when peeling) should be the same, but the result will be different if the adhesive is applied and dried in different applying units (adhesive applying unit) It will be.

  That is, the first adhesive layer 21A and the third adhesive layer 21B on the lower surfaces of the laminated upper piece 12 and the laminated middle piece 13, and the second adhesive layer 22A on the upper surfaces of the laminated middle piece 13 and the laminated lower piece 14. The fourth adhesive layer 22B is formed by being applied to different surfaces by different adhesive application units and dried by different drying units. Thereby, even if the same adhesive is used and the same coating thickness is set in different adhesive coating units, a mechanical error or an operating environment (for example, time elapses after forming the first adhesive layer 21A or the like). (For example, when the second adhesive layer 22A is formed after the second adhesive layer 22A is formed), the coating thickness varies, and the laminating piece 13 has already been formed by the drying process when forming the second adhesive layer 22A. The adhesive force (peeling force) of the first adhesive layer 21A and the third adhesive layer 21B and the adhesive force of the second adhesive layer 22A and the fourth adhesive layer 22B are generally added to the third adhesive layer 21B. The result is not equal to the force (peeling force).

  Therefore, the first adhesive layer 21A of the upper piece 12 and the second adhesive layer 22A of the middle piece 13 are used as overlapping surfaces, and the third adhesive layer 21B of the middle piece 13 and the fourth adhesive layer 22B of the lower piece 14 are stacked. Is used as a superposed surface to form a superposed adhesive sheet 11 which is pressed. Thereby, the total applied amount of the adhesive of the first lap adhesive layer 31 (the first adhesive layer 21A and the second adhesive layer 22A) between the upper layer piece 12 and the middle piece 13 is determined, and The total amount of the adhesive applied to the second overlapping adhesive layer 32 (the third adhesive layer 21A and the fourth adhesive layer 22B) between the lower piece 14 and the lower piece 14 is substantially the same, and the adhesive force (peeling force) thereof is substantially the same. It can be made to.

  Here, regarding the application thickness of the first adhesive layer 21A, the second adhesive layer 22A, the third adhesive layer 21B, and the fourth adhesive layer 22B, which is one of the factors that influence the adhesive force (peeling force), FIG. As shown in the figure, the coating thickness a of the first adhesive layer 21A on the lower surface of the laminated upper piece 12, the coating thickness b of the second adhesive layer 22A on the upper surface of the laminated piece 13, and the application of the third adhesive layer 21B on the lower surface of the laminated piece 13 The thickness c and the applied thickness d of the fourth adhesive layer 22B on the upper surface of the laminated lower piece 14 are set.

In this case, if the first adhesive layer 21A and the third adhesive layer 21B are collectively formed by an adhesive application unit, and the second adhesive layer 22A and the fourth adhesive layer 22B are collectively formed by different adhesive application units, From the above, the thickness ratio is
a: b ≠ 1: 1 (1)
c: d ≠ 1: 1 (2)
In some cases, b (d) ≧ 1.2 or b (d) ≦ 0.8 for a = 1 (c = 1). Therefore, by setting the first adhesive layer 21A and the second adhesive layer 22A as the overlapping surface and setting the third adhesive layer 21B and the fourth adhesive layer 22B as the overlapping surface, a = c and b = d From
a + b ≒ c + d (3)
It is made to be. The same can be said by replacing this with an adhesive force (peeling force) a: b ≠ 1: 1 and c: d ≠ 1: 1 taking into account the dry state.

  By the way, in the above embodiment, the peelable adhesives forming the first adhesive layer 21A, the second adhesive layer 22A, the third adhesive layer 21B, and the fourth adhesive layer 22B have the same components and are set to the same application thickness. Although the description has been made assuming that the application thickness of the first adhesive layer 21A and the third adhesive layer 21B is intentionally made different from the application thickness of the second adhesive layer 22A and the fourth adhesive layer 22B, or the first adhesive layer 21A and the The first adhesive layer 21A and the third adhesive layer 21B (the second adhesive layer 21B and the fourth adhesive layer 22B) may have different adhesive strengths by using different types of adhesives to form the third adhesive layer 21B, the second adhesive layer 22A, and the fourth adhesive layer 22B. By making the second adhesive layer 22A and the fourth adhesive layer 22B (the first adhesive layer 21A and the third adhesive layer 21B) the superimposed surfaces on the second adhesive layer 22A and the fourth adhesive layer 22B), as a result, 1st overlap Adhesion between layers 31 and the second overlapping adhesive layer 32 (peeling strength) in which substantially can be the same as.

  Varying the application thickness of the adhesive also has the further effect of making one of the thicknesses less curl when a certain adhesive strength is developed. In addition, different kinds of adhesives to be used have a further effect of facilitating the strength of the adhesive force.

  The application patterns of the adhesives for forming the first adhesive layer 21A, the second adhesive layer 22A, the third adhesive layer 21B, and the fourth adhesive layer 22B may be so-called solid coatings. It is preferable that one of the surfaces is solid-coated and the other is a halftone dot or a stripe.

  That is, when the first adhesive layer 31 and the second adhesive layer 32 are separated, the first adhesive layer 21A and the second adhesive layer 22B are separated, and the third adhesive layer 21B and the fourth adhesive layer 22B are separated. Are separated so that they are separated from each other. In the case of solid-coated patterns, since the laminated piece after peeling is easily curled, one of them (particularly, the laminated piece to be peeled) is used to avoid curling. This is because the adhesive strength is weakened without making the surface a solid pattern. On the other hand, if the application pattern is stripes or halftone dots, it is difficult to adjust the overlapping position to obtain a desired adhesive strength. There is also a merit that it is easy to do.

  FIG. 1B shows a laminated adhesive sheet 11 composed of a laminated upper piece 12, two laminated pieces 13 (a first laminated piece 13A and a second laminated piece 13B), and a laminated lower piece 14. The other components are the same as those in FIG. The same applies to a case where three or more pieces are laminated.

  That is, when the two pieces (the first piece 13 </ b> A and the second piece 13 </ b> B) in the lamination piece 13 are releasably overlapped and bonded to form one piece 13 in the whole lamination. In addition to the second adhesive layer 22A formed on the second surface and the third adhesive layer 21B formed on the third surface, the same peelable adhesive as described above is applied to each of the superposed surfaces between the laminated pieces. A first intermediate adhesive layer 21C and a second intermediate adhesive layer 22C facing each other are formed.

  Specifically, as shown in FIG. 1B, a first intermediate adhesive layer 21C is formed with a thickness (c1) on the lower surface of the first laminated piece 13A, and on the upper surface of the second laminated piece 13B. The second intermediate adhesive layer 22C is formed with a thickness (c2). It is to be noted that the second adhesive layer 22A is formed on the upper surface of the first lamination piece 13A, and the third adhesive layer 21B is formed on the lower surface of the second lamination piece 13B, as described above.

In this case, the first adhesive layer 21A, the third adhesive layer 21B, and the first intermediate adhesive layer 21C are collectively formed by an adhesive application unit, and the second adhesive layer 22A, the fourth adhesive layer 22B, and the second intermediate adhesive layer are formed. When 22C is collectively formed by different adhesive application units, the thickness ratio is
a: b ≠ 1: 1 (4)
c1: c2 ≠ 1: 1 (5)
c: d ≠ 1: 1 (6)
Becomes

Therefore, the first adhesive layer 21A and the second adhesive layer 22A are used as an overlapping surface, the first intermediate adhesive layer 21C and the second intermediate adhesive layer 22C are used as an overlapping surface, and the third adhesive layer 21B and the fourth adhesive layer 22B are used. Is a superimposed surface, a = c = c1 and b = d = c2.
c1 + c2 ≒ a + b ≒ c + d (7)
And c1 + c2 is made to be nearly equal to the equation (3).

  In this manner, the laminated upper piece 12, the first laminated piece 13A, the second laminated piece 13B, and the laminated lower piece 14 are laminated and pressed to form the laminated adhesive sheet 11, whereby the laminated upper piece 12 and the first laminated piece 13A are joined together. The adhesive force (peeling force) of the first lap adhesive layer 31 between the laminating piece 13A and the adhesive force (peeling force) of the second lap adhesive layer 32 between the first laminating piece 13A and the second laminating piece 13B Force) and the adhesive force (peeling force) of the third overlapping adhesive layer 33 between the second laminating piece 13B and the laminating lower piece 14 can be made substantially the same.

  Therefore, FIG. 2 shows an explanatory view of a manufacturing process of the superposed adhesive sheet of FIG. Here, although not shown, the manufacturing apparatus generally includes at least a first adhesive application unit, a first drying unit, a second adhesive application unit, a second drying unit, a cutting unit, a positioning unit, and a pressure bonding unit. Here, as described above, the components of the peelable adhesive applied in the first adhesive application section and the second adhesive application section are the same, and the description will be made assuming that the application thickness is set to be the same.

  First, as shown in FIG. 2 (A), the laminated upper piece 12, the laminated piece 13 and the laminated lower piece 14 are formed by a single cutting line 15 (not necessarily formed, and a sewing line may be formed). As shown in FIG. 2 (B), with respect to the continuously provided sheet base, the above-mentioned peelable adhesive is applied to the lower surface (one surface) of the upper lamination piece 12 and the middle lamination piece 13 by the first adhesive application portion. Is applied and dried by the first drying unit to form the first adhesive layer 21A on the lower surface of the laminated upper piece 12 and the third adhesive layer 21B on the lower surface of the laminated piece 13.

  Subsequently, as shown in FIG. 2 (C), the releasable adhesive is applied to the upper surfaces (the other surfaces) of the lamination middle piece 13 and the lamination lower piece 14 by a second adhesive application part, and a second drying part is formed. The second adhesive layer 22A is formed on the upper surface of the laminating piece 13 by drying, and the fourth adhesive layer 22B is formed on the upper surface of the laminating lower piece 14. Therefore, as shown in FIG. 2 (D), the sheet is cut along a single cutting line 15 by a cutting section to form a single laminated upper piece 12, a laminated middle piece 13, and a laminated lower piece 14.

  Subsequently, as shown in FIG. 2 (E), the first adhesive layer 21A of the upper laminated piece 12 and the second adhesive layer 22A of the middle laminated piece 13 are aligned as an overlapping surface in the alignment portion, and the alignment is performed. The third adhesive layer 21B of the middle piece 13 and the fourth adhesive layer 22B of the laminated lower piece 14 are positioned as an overlapping surface. Then, the laminated adhesive sheet 11 is formed by crimping at the crimping portions 51A and 51B.

  As described above, even if the adhesive strength (peeling force) between the first adhesive layer 21A and the third adhesive layer 21B and the second adhesive layer 22A and the fourth adhesive layer 22B is different, the second adhesive layer 21A is attached to the first adhesive layer 21A. By making the layer 22A an overlapping surface and making the fourth adhesive layer 22B an overlapping surface with respect to the third adhesive layer 21B, a difference in adhesive force is absorbed, and an adhesive force difference between the plurality of laminated pieces is obtained. Can be suppressed, and quality control can be facilitated.

  Next, FIG. 3 shows an explanatory view in the case where the laminated adhesive sheet according to the present invention is applied to a reciprocating postcard, and FIGS. 4 and 5 show explanatory views of the manufacturing process of the reciprocating postcard of FIG. FIGS. 3 to 5 show a case in which the superimposed adhesive sheet is applied to a reciprocating postcard, in which the laminated pieces are superimposed releasably in the form of a postcard booklet. The adhesive layer is the same as that described with reference to FIG.

  3A and 3B, the reciprocating postcard 41 is composed of an outgoing postcard 42 and a reply postcard 43, and the outgoing postcard 42 corresponds to the laminated adhesive sheet 11 according to the present invention. The outgoing postcard 42 is composed of a laminated upper piece 12, a laminated piece 13 and a laminated lower piece 14, and a reply postcard 43 is connected to the laminated piece 13 by a cutting line 43A. The laminating piece 13 and the reply postcard 43 are large postcards, and the laminating upper piece 12 and the laminating lower piece 14 are smaller than the laminating piece 13 in the width direction. It is formed so that the character of "postal postcard" can be visually recognized. The return postcard 43 may be provided continuously with another laminated piece (the laminated upper piece 12 or the laminated lower piece 14).

  On the lower surface, which is one surface of the laminated upper piece 12, predetermined information is formed, a first adhesive layer 21A is formed, and on the upper surface, address information as an outgoing postcard is formed. Note that address information and the like for reply are formed on the lower surface of the reply postcard 43, and predetermined information is formed on the upper surface. A fourth adhesive layer 22B is formed on the other upper surface of the lower laminated piece 14, and an adhesive binding layer 45 made of a strong adhesive (for example, hot melt) is provided on the end of the postcard 43 side. It is formed. The lower surface of the lower laminate piece 14 is provided with a blindfold pattern so that the information of the middle laminate piece 13 cannot be seen through.

  Further, predetermined information is formed on the other surface (upper surface) of the stacking piece 13, and a second adhesive layer 22 </ b> A is formed on the upper piece 12 at a position corresponding to the first adhesive layer 21 </ b> A. Predetermined information is formed on one surface (lower surface) of the laminating piece 13, and a third adhesive layer 21 B is formed at a position corresponding to the fourth adhesive layer 22 B of the laminating lower piece 14. An adhesive binding layer 45 made of a strong adhesive (for example, hot melt) is formed at the end on the side. Then, the first adhesive layer 21A of the laminated upper piece 12 and the second adhesive layer 22A of the laminated piece 13 are used as overlapping surfaces, and the third adhesive layer 21B of the laminated piece 13 and the fourth adhesive layer 22B of the laminated lower piece 14 are arranged. Are bonded and fixed by the adhesive binding layer 45 and can be peeled off by the first overlapping adhesive layer 31 and the second overlapping adhesive layer 32.

  As shown in FIG. 3C, the reciprocating postcard 41 peels off the laminated upper piece 12 from the corner opposite to the reply postcard 43 in the outgoing postcard 42 when the flight arrives, and the opposite side of the reply postcard 43. And peel off the laminated lower piece 14 from the corner, and become a booklet form after peeling. Then, the reply postcard 43 is separated from the cutting line 43A, and is posted after filling in predetermined information.

  The production of the reciprocating postcard 41 as described above is shown in FIG. 4 and FIG. Although the manufacturing apparatus is not shown, the first adhesive applying section, the first drying section, the second adhesive applying section, the second drying section, the transport direction cutting section, the first binding adhesive applying section, It has at least a double-stitch adhesive application section, a positioning section, a folding section, a width direction cutting section, and a pressure bonding section. Here, as described above, the components of the peelable adhesive applied in the first adhesive application section and the second adhesive application section are the same, and the description will be made assuming that the application thickness is set to be the same.

  First, in FIG. 4 (A), the upper lamination piece 12, the middle lamination piece 13, the return postcard 43, and the lower lamination piece 14 are continuously provided in the width direction via the conveyance direction cutting line 46, and these are further connected to the width direction cutting line. The corresponding information as shown in the figure is provided on the front and back of the continuous sheet 40 which is continuously provided in the conveyance direction via the conveyance direction 47 and the marginal portions 44 are provided on both sides in the conveyance direction via the conveyance direction cutting line 46. Printed. That is, it is a so-called post-glue type in which a peelable adhesive layer is formed after printing, and a change in adhesive force due to printing (ink) on the adhesive layer in a pre-glue type in which a peelable adhesive layer is formed before printing. Therefore, there is an advantage that the adhesive force can be easily grasped.

  Therefore, as shown in FIG. 4B, the peelable adhesive is applied to predetermined positions on the lower surfaces of the upper lamination piece 12 and the middle lamination piece 13 by the first adhesive application section, and dried by the first drying section. By doing so, the first adhesive layer 21A and the third adhesive layer 21B are formed. Subsequently, as shown in FIG. 4 (C), the above-mentioned peelable adhesive is applied to predetermined positions on the upper surfaces of the lamination middle piece 13 and the lamination lower piece 14 by the second adhesive application section, and the second drying section The second adhesive layer 22A and the fourth adhesive layer 22B are formed by drying.

  Subsequently, as shown in FIG. 4 (D), the sheet is cut by the conveying direction cutting section 46 along the conveying direction cutting line 46 to form continuous laminating pieces 12, laminating pieces 13 and laminating lower pieces 14, respectively. As shown in E), on the upper surface of the laminating piece 13, on the side of the cutting line 43 A with the reply postcard 43, adjacent to the second adhesive layer 22 A, the first binding adhesive is applied with a strong adhesive by a first adhesive. The layer 45 is formed, and in a separate step, the upper surface of the laminated lower piece 14, which is adjacent to the fourth adhesive layer 22 </ b> B on the side of the laminated piece 13 on the side of the laminated sheet 13, is stapled with a strong adhesive by the second stapling adhesive application section. Layer 45 is formed.

  Subsequently, as shown in FIG. 5 (A), the continuous upper piece 12, the middle piece 13 and the lower piece 14 are continuously stacked with the first adhesive layer 21 of the upper piece 12 in the alignment portion. The piece 13 (the postcard 43) is aligned with the second adhesive layer 22 as an overlapping surface. Next, as shown in FIG. 5 (B), the reply postcard 43 is bent at the folding portion toward the lower stacking piece 14 side, and is cut by the width cutting portion 47 at the width cutting line 47 as shown in FIG. 5 (C). The laminated upper piece 12, the laminating piece 13, the laminated lower piece 14, and the folded return postcard 43 are each one unit. Then, as shown in FIG. 5 (D), the return postcard 43 shown in FIG. 3 (A) is bent into a reciprocating postcard 41 by crimping at the crimping portions 51A and 51B.

  In addition, the folding step of the postcard 43 may be performed after cutting by the width-direction cutting unit, or may be after crimping by the crimping unit. Regarding the folding direction of the reply postcard 43, if an address is formed on the laminated lower piece 14, it may be folded to the laminated upper piece 12 side. However, depending on the positional relationship with the transport roller transported to the next step. What is necessary is just to determine so that the reply postcard 43 is not located on the said conveyance roller side.

  As described above, even when the laminated adhesive sheet 11 according to the present invention is applied to the reciprocating postcard 41, similarly, the first adhesive layer 21A and the third adhesive layer 21B, the second adhesive layer 22A and the fourth adhesive layer 22B, , The second adhesive layer 22A is used as an overlapping surface with the first adhesive layer 21A, and the fourth adhesive layer 22B is used as an overlapping surface with the third adhesive layer 21B, even if the adhesive force (peeling force) differs. Thereby, the difference in the adhesive strength is absorbed, and it is possible to suppress the occurrence of the difference in the adhesive strength between the plurality of laminated pieces, thereby facilitating the quality control.

  The laminated adhesive sheet of the present invention can be used in industries such as production, sales, and use of forms, sealed letters, postcards, pamphlets, and booklets.

DESCRIPTION OF SYMBOLS 11 Lamination adhesive sheet 12 Lamination upper piece 13 Lamination middle piece 14 Lamination lower piece 15, 46 Piece cutting line 21A 1st adhesive layer 21B 3rd adhesive layer 22A 2nd adhesive layer 22B 4th adhesive layer 31 1st adhesive layer 32 Second overlapping adhesive layer 40 Continuous sheet 41 Reciprocating postcard 42 Outgoing postcard (overlapping adhesive sheet)
43 reply postcard 44 marginal part 45 adhesive binding layer 51A, 51B crimping part

Claims (2)

A non-re-adhesive first adhesive layer having a thickness (a) is formed on substantially the entirety of the first surface , which is the lower surface of the laminated upper piece, and is peeled on substantially the entirety of the second surface , which is the upper surface of the laminated piece. A possible non-re-adhesive second adhesive layer is formed with a thickness (b), and a non-re-adhesive third adhesive layer that can be peeled off substantially the entire third surface , which is the lower surface of the lamination piece, has a thickness ( c) a non-re-adhesive fourth adhesive layer having a thickness (d) formed on substantially the entire fourth surface , which is the upper surface of the laminated lower piece, having a thickness of (d); Lamination in which the second surface of the laminating piece is a laminating surface and the third surface of the laminating piece and the fourth surface of the laminating lower piece are laminating surfaces and are releasably bonded. An adhesive sheet,
The relationship between the thicknesses,
a: b ≠ 1: 1 (1)
c: d ≠ 1: 1 (2)
a + b ≒ c + d (3)
A laminated adhesive sheet, characterized in that: It is a lap adhesive sheet of Claim 1, Comprising:
A second adhesive layer formed on the second surface when the plurality of laminated pieces are laminated and non-re- attachable and releasably superimposed and adhered to form a single laminated piece; And in addition to the third adhesive layer formed on the third surface, a first intermediate adhesive layer having a releasable thickness (c1) and a thickness (c2) facing each of the superposed surfaces between the respective laminated pieces . Each of the second intermediate adhesive layers is formed and adhered to substantially the entire surface, and the relationship between the thicknesses of the first intermediate adhesive layer and the second intermediate adhesive layer is as follows :
c1: c2 ≠ 1: 1
a + b ≒ c1 + c2
A laminated adhesive sheet, characterized in that:

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