JP6649113B2 - 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-mentioned problem, in the invention according to claim 1, there is provided a laminated adhesive sheet in which a laminated upper piece, a predetermined number of laminated pieces and a laminated lower piece are releasably laminated and adhered, A non-re-adhesive first adhesive layer formed releasably on substantially the entire surface of one side surface and substantially the entire surface of one surface of the laminated piece; substantially the entire other surface of the laminated piece and the laminated lower piece; And a non-re- attachable second adhesive layer formed releasably on a surface that is superimposed on the first adhesive layer on one side surface of the first adhesive layer.

According to the present invention, the laminated upper piece and the first adhesive layer substantially the entire surface of the peelable non re-adhesive one side of the stack in the strip are formed, substantially the entire surface of the other surface of the laminate in pieces and stacked lower piece A non-re- attachable second adhesive layer that can be peeled off is formed on the first adhesive layer. With the configuration in which the second adhesive layer is used as an overlapping surface, even when the first adhesive layer and the second adhesive layer are formed at different times, and the adhesive strength between the first adhesive layer and the second adhesive layer is different. By making the second adhesive layer a superposed surface with respect to the first adhesive layer, it is possible to suppress generation of an adhesive force difference between the plurality of laminated pieces and to facilitate quality control.

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, and the like. The first adhesive layer 21 is formed on one surface (lower surface) of the piece 13, and the second adhesive layer 22 is formed on the other surface (upper surface) of the laminating piece 13 and the laminating lower piece 14, respectively.

  The first adhesive layer 21 is formed of a peelable adhesive. As the adhesive, an aqueous emulsion adhesive or an adhesive varnish (for example, an ultraviolet curable varnish) is used. It is the same as that used for conventional crimped postcards and the like. The second adhesive layer 22 is formed of a peelable adhesive. As the adhesive, an aqueous emulsion-based adhesive or an adhesive varnish (for example, an ultraviolet curable varnish) similar to the above. Are used. When the first adhesive layer 21 uses an aqueous emulsion adhesive, the second adhesive layer 22 also uses an aqueous emulsion adhesive, and the first adhesive layer 21 uses an adhesive varnish. In this case, an adhesive varnish is also used for the second adhesive layer 22. In this case, the peelable adhesive used in the first adhesive layer 21 and the second adhesive layer 22 has the same component and the same weight ratio, so that the adhesive strength (when peeling) The peeling force) should be the same, but if the adhesive is applied and dried in a different application unit (adhesive application unit), the result will be different.

  That is, the first adhesive layer 21 on the lower surfaces of the upper laminated piece 12 and the middle laminated piece 13 and the second adhesive layer 22 on the upper surfaces of the laminated middle piece 13 and the laminated lower piece 14 are different from each other. They are formed by being applied by different adhesive application units and dried by different drying units. Thereby, even if the same adhesive is used in the different adhesive coating units and the same coating thickness is set, the mechanical error or the operating environment (for example, time has elapsed after the formation of the first adhesive layer 21). Due to the difference in the case where the second adhesive layer 22 is formed later, the application thickness varies, and the laminating piece 13 has already been formed by the drying process when the second adhesive layer 22 is formed. Therefore, the adhesive force (peeling force) of the first adhesive layer 21 and the adhesive force (peeling force) of the second adhesive layer 22 are not equal to each other.

  Then, the first adhesive layer 21 of the laminated upper piece 12 and the second adhesive layer 22 of the laminated piece 13 are used as overlapping surfaces, and the first adhesive layer 21 of the laminated piece 13 and the second adhesive layer 22 of the laminated lower piece 14 are arranged. 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 21 and the second adhesive layer 22) between the upper layer piece 12 and the middle piece 13 is determined, and The total amount of the adhesive applied to the second lap adhesive layer 32 (the second adhesive layer 22 and the first adhesive layer 21) 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 be.

  Here, regarding the application thickness of the first adhesive layer 21 and the second adhesive layer 22, which is one of the factors that influence the adhesive force (peeling force), as shown in FIG. The thickness a of the first adhesive layer 21, the thickness b of the second adhesive layer 22 on the upper surface of the laminated piece 13, the thickness c of the first adhesive layer 21 on the lower surface of the laminated piece 13, and the second adhesion of the upper surface of the laminated lower piece 14. Assuming that the coating thickness d of the layer 22 is the above, the thickness ratios are a: b ≠ 1: 1 and c: d ≠ 1: 1 from the above. In some cases, a = 1 (c = 1) and b ( In some cases, d) ≧ 1.2 or b (d) ≦ 0.8. Therefore, by setting the first adhesive layer 21 and the second adhesive layer 22 as superposed surfaces, a = b and c = d because a = c and b = d. 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 adhesive forming the first adhesive layer 21 and the peelable adhesive forming the second adhesive layer 22 have the same components and are set to have the same application thickness. However, the coating thickness of the first adhesive layer 21 and the coating thickness of the second adhesive layer 22 are intentionally made different, or the types of the adhesives forming the first adhesive layer 21 and the second adhesive layer 22 are made different. Even if the adhesive strength is made different, the first adhesive layer 21 (second adhesive layer 22) is made to overlap the second adhesive layer 22 (first adhesive layer 21) with the first adhesive layer 21 (second adhesive layer 22). The adhesive force (peeling force) between the lap adhesive layer 31 and the second lap adhesive layer 32 can be made substantially the same.

  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 pattern of the adhesive for forming the first adhesive layer 21 and the second adhesive layer 22 may be so-called solid coating, but one of the application patterns is solid-coated and the other is a halftone dot or a stripe. Is preferred. That is, when the first adhesive layer 31 and the second adhesive layer 32 are separated, the first adhesive layer 21 and the second adhesive layer 22 are separated so as to be separated from each other. In this case, since the laminated piece after peeling is apt to be curled, in order to avoid curling, the surface of one (particularly, the laminated piece to be peeled) is made to have a weak adhesive force without a solid pattern. is there. 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.

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

  That is, the first adhesive layer 21 is formed on one surface (lower surface) of each of the laminated upper piece 12, the first laminated piece 13A, and the second laminated piece 13B, and the first laminated piece 13A and the second laminated piece 13B are formed. Then, the second adhesive layer 22 is formed on the other surface (upper surface) of the laminated lower piece 14, respectively.

  Then, the first adhesive layer 21 of the upper lamination piece 12 and the second adhesive layer 22 of the first lamination piece 13A are used as a superposed surface, and the second adhesion between the first adhesion layer 21 of the lamination piece 13 and the lamination lower piece 14 is performed. The laminated adhesive sheet 11 is formed by pressing the layer 22 as an overlapping surface. Thereby, the adhesive force (peeling force) of the first lap adhesive layer 31 between the upper lamination piece 12 and the first lamination piece 13A, and the adhesive force (peeling force) between the first lamination piece 13A and the second lamination piece 13B. The adhesive force (peeling force) of the two-ply adhesive layer 32 and the adhesive force (peeling force) of the third adhesive layer 33 between the second middle piece 13B and the lower piece 14 can be made substantially the same. You can do it.

  In the above embodiment, the first adhesive layer 21 and the second adhesive layer 22 are formed using a releasable adhesive (aqueous emulsion-based adhesive or adhesive varnish). One of the first adhesive layer 21 and the second adhesive layer 22 is formed using an aqueous emulsion-based adhesive, and the other is formed using a generally known release agent such as a silicon-based non-adhesive varnish. Even if the first and second adhesive layers 31 and 32 can be peeled off from each other.

  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 releasable 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), the peelable adhesive is applied to one surface (lower surface) of the upper lamination piece 12 and the middle lamination piece 13 by the first adhesive application portion, as shown in FIG. Then, the first adhesive layer 21 is formed by being dried by the first drying unit.

  Subsequently, as shown in FIG. 2C, the peelable adhesive is applied to the other surface (upper surface) 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 22 is formed by drying. 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 21 of the upper laminated piece 12 and the second adhesive layer 22 of the middle laminated piece 13 are aligned as an overlapping surface in an alignment portion, and the alignment is performed. The first adhesive layer 21 of the middle piece 13 and the second adhesive layer 22 of the laminated lower piece 14 are aligned 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 strength) of the first adhesive layer 21 and the second adhesive layer 22 is different, the adhesive strength is obtained by making the second adhesive layer 22 overlap the first adhesive layer 21. Is absorbed, and it is possible to suppress the occurrence of a difference in the adhesive force between the plurality of laminated pieces, thereby facilitating quality control.

  FIG. 3 is an explanatory view of a case where the superimposed adhesive sheet according to the present invention is applied to a reciprocating postcard, and FIGS. 4 and 5 are explanatory views of a 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 21 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 second adhesive layer 22 is formed on the upper surface, which is the other surface of the laminated lower 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 laminating piece 13, and a second adhesive layer 22 is formed at a position corresponding to the first adhesive layer 21 of the laminating piece 12. Predetermined information is formed on one surface (lower surface) of the laminating piece 13, a first adhesive layer 21 is formed at a position corresponding to the second adhesive layer 22 of the laminating lower piece 14, and a reply postcard 43 is formed. An adhesive binding layer 45 made of a strong adhesive (for example, hot melt) is formed on the side end. Then, the first adhesive layer 21 of the laminated upper piece 12 and the second adhesive layer 22 of the laminated piece 13 are used as overlapping surfaces, and the first adhesive layer 21 of the laminated piece 13 and the second adhesive layer 22 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 a predetermined position on one surface (lower surface) of the upper lamination piece 12 and the middle lamination piece 13 by the first adhesive application portion, and the first adhesive is applied. The first adhesive layer 21 is formed by drying in a drying unit. Subsequently, as shown in FIG. 4C, the peelable adhesive is applied to a predetermined position on the other surface (upper surface) of the lamination middle piece 13 and the lamination lower piece 14 by a second adhesive application portion. The second adhesive layer 22 is formed by drying in the second drying unit.

  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, the first binding adhesive application unit binds with a strong adhesive. A layer 45 is formed, and in a separate step, on the upper surface of the laminated lower piece 14, on the side of the piece 13 during lamination, adjacent to the second adhesive layer 22, the second binding adhesive application unit binds with a strong adhesive. 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 superimposed adhesive sheet 11 according to the present invention is applied to the reciprocating postcard 41, the first adhesive layer 21 and the second adhesive layer 22 may have different adhesive strengths (peeling strengths). By making the second adhesive layer 22 a superposed surface with respect to the adhesive layer 21, a difference in adhesive force is absorbed, and it is possible to suppress the occurrence of an adhesive force difference between a plurality of laminated pieces. Thus, quality control can be facilitated.

  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 Single cutting line 21 1st adhesive layer 22 2nd adhesive layer 31 1st adhesive layer 32 2nd adhesive layer 40 Continuous sheet 41 Reciprocation Postcard 42 Outbound postcard (overlap adhesive sheet)
43 reply postcard 44 marginal part 45 adhesive binding layer 51A, 51B crimping part

Claims (1)

Laminated upper sheet, a predetermined number of laminating pieces and a laminated lower piece is a laminated adhesive sheet that is laminated and bonded releasably,
A non-re-adhesive first adhesive layer formed releasably on substantially the entire one side surface of the laminated upper piece and substantially the entirety of one surface of the laminated piece;
A substantially non-re-adhesive second surface, which is substantially the entire surface of the other side of the laminating piece and the substantially entire surface of one side surface of the lower laminating piece, and which is releasably formed on a surface to be overlapped with the first adhesive layer. 2 adhesive layers,
A superimposed adhesive sheet comprising:

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