JP6649032B2 - Laminated adhesive sheet - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a laminated adhesive sheet which is laminated and bonded by an adhesive layer formed on an edge portion and is peeled off and opened from an adhesive layer portion.

  2. Description of the Related Art In recent years, adhesive sheets that have been removably overlapped and adhered have been widely used for forms, sealed letters, postcards, pamphlets, booklets, and the like. It is necessary to prevent such a laminated adhesive sheet from tearing when peeled and opened.

  2. Description of the Related Art Conventionally, various kinds of superposed adhesive sheets which are later peeled and opened to recognize information or the like are known. For example, as described in Patent Document 1, the front side and the back side of a three-fold sealed form for producing a sealed letter by bonding the edges of a three-folded sealed upper piece, a sealed middle piece, and a sealed lower piece. There is known a three-fold sealed form in which the adhesive provided in the vertical direction on the side has a dashed bar shape and the adhesive provided in the horizontal direction has a linear shape.

  Further, as described in Patent Literature 2, after a sheet is folded in three along two folding lines, and further folded in four along the folding line, the sheet is folded into a regular mail size. 2. Description of the Related Art There is known a letter sealed in such a manner that it can be ventilated and re-peelable with an adhesive applied in a dot shape with a gap.

  Further, as described in Patent Literature 3, a release agent is applied to each of the opposing surfaces in the binding portion, and at each of the opposing release agent application portions in the binding portion, at least when the release agent application portion is superimposed. A binding portion that is provided with a release agent non-applied portion that partially overlaps, makes at least one release agent non-applied portion discontinuous, and binds to each other via a linearly formed adhesive covering the release agent non-applied portion. There is known a sealed letter stitched together so as to be separable.

JP-A-07-017171 Japanese Patent No. 3153908 Japanese Patent No. 371701

  However, the adhesive described in each of the above patent documents is not for pseudo-adhesion having a weak adhesive force, but uses an aqueous adhesive, and when peeling and opening, the adhesive in the thickness direction of the adhesive is used. Although the adhesive is separated so as to be peeled between the layers, in the case where the adhesive is formed in the shape of the above-mentioned dashed bar, dot or discontinuity, even if it is a spot-like adhesive, it is locally adhered with a strong adhesive force. Therefore, there is a problem in that the force applied at the time of peeling and opening does not concentrate between the layers of the adhesive, and the paper is easily torn.

  Then, this invention was made | formed in view of the said subject, and an object of this invention is to provide the lamination | stacking adhesive sheet which prevents a paper break at the time of peeling and opening.

In order to solve the above-mentioned problem, in the invention of claim 1, at least the first three pieces of paper are adhered to at least the first piece of paper and the second piece of paper to be overlapped with one side of the edge as a folded part or a joint part, be any of the corners adhesive sheet overlay peeling is opened to the release direction over more diagonal direction of the release end peeling start end of, what Re of the three sides of the first paper and the second paper, A release layer formed by intermittently providing a release agent-free region having a shape in which the longitudinal direction of the elongated shape is substantially the same as the release direction, and an adhesive applied to at least the release agent-free region And an adhesive layer to be formed.

According to the first aspect of the present invention, one edge of the edge portion is a folded portion or a bonding portion, and the other three sides are adhered to each other, and peeled in a peeling direction from a peeling start end to a diagonal peeling end from one of the corners. what Re or three sides of at least the first paper and the second paper is opened, the elongate release layer substantially release agent non-forming region of the shape in the same direction are provided intermittently in the longitudinal direction and the peeling direction of the shape By forming and forming an adhesive layer coated with an adhesive at least in the area where no release agent is formed, the adhesive layer becomes elongated in the peeling direction, and the area of the adhesive layer which is peeled off at the time of opening is reduced and the adhesive layer is broken. This facilitates separation between layers, thereby preventing paper breakage.

It is a lineblock diagram of an embodiment in a superposition adhesive sheet concerning the present invention. It is each part sectional drawing of the superposition | adhesion sheet of FIG. FIG. 2 is an explanatory diagram of a partially peeled state of the superposed adhesive sheet of FIG. 1. It is an explanatory view of another embodiment in a lap adhesive sheet concerning the present invention.

  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 is a configuration diagram of an embodiment of a superposition adhesive sheet according to the present invention, and FIG. 2 is a sectional view of each part of the superposition adhesive sheet of FIG. 2A is a cross-sectional view taken along the line AA (BB) of FIG. 1B, FIG. 2B is a cross-sectional view taken along the line CC of FIG. 1B, and FIG. It is DD sectional drawing of A).

  In FIG. 1 (A), the overlapping adhesive sheet 11 is obtained by folding and bonding a first sheet 12 and a third sheet 13 by a folding section 14 (FIG. 1 (B)). The length in the direction is shorter than the second paper piece 13, so that when folded, the second paper piece 13 is formed with an overlapping extension 15 that does not overlap with the first paper piece 12. Also, a step 16 is formed at the end of the folded first sheet 12 on the extension 15 side with respect to the second sheet 13. The stepped portion 16 has, for example, a peeling start end 17 at a lower corner (or an upper corner) and is peeled from the peeling start end 17 in a peeling direction Toff in a diagonal direction. It is not necessary to provide the overlapping extension portion 15 and the step portion 16, and in this case, the portion of the peeling start end 17 may be made non-adhesive.

  As shown in FIG. 1B, a first paper piece 12 and a second paper piece 13 are continuously provided at a folding section 14. As papers, for example, coated paper is used. Further, as shown in FIGS. 1B and 1C, the release layer 21 is formed in a U-shape on three sides other than the side of the folded portion 14 on the edge of the second paper piece 13. The non-forming region 22 is formed intermittently (for example, at equal intervals). As the release agent, for example, a varnish is used. One of the three sides of the second sheet 13 is a side excluding the overlapping extension 15, and regardless of the presence or absence of the overlapping extension 15, the sheet to be overlapped ( The corresponding side (side facing the folded portion 14) of the first paper sheet 12) is a side on which the corresponding side is overlapped.

  The release agent non-forming region 22 is a rectangular elongated shape which is arranged side by side at predetermined intervals, and its longitudinal direction is, for example, the lower right corner of the first paper sheet 12 shown in FIG. In the case of 17, the direction is substantially the same as the direction of the separation (Toff) from the separation start end 17 to the diagonal end of the separation (lower right corner to upper left corner). The release layer 21 including the release agent non-formed region 22 can be formed by, for example, a mold (plate).

  An adhesive layer 31 is applied and formed on the release layer 21 including the juxtaposed release agent non-formation regions 22 and enters the release agent non-formation regions 22 as shown in FIGS. 2 (A) and 2 (B). The first paper piece 12 and the second paper piece 13 are overlapped and bonded by the adhesive layer 31 of the adhesive. The interval between the adhesive layers 31 (the release agent non-formed area 22) is appropriately formed in accordance with the adjustment of the adhesive force, but is preferably larger than the length in the width direction with respect to the longitudinal direction of the elongated shape. As the adhesive, an aqueous emulsion-based adhesive is used.

  In forming the adhesive layer 31, the adhesive may be formed only in the release agent non-formation region 22 so as to be intermittent instead of being continuous as shown in the figure. Intermittent sides may be mixed. In the case of intermittent, the adhesive may be applied in a drop-like manner onto the release agent non-forming region 22 of the release layer 21 and may enter the release agent non-forming region 22. Rough application accuracy is not required to such an extent.

  Then, the first sheet 12 is folded from the folding section 14 toward the second sheet 13 so as to be overlapped and adhered by the adhesive layer 31. FIG. 2C (a cross-sectional view taken along line DD in FIG. 1A). As shown in (2), the adhesive constituting the adhesive layer 31 is formed on the release layer 21 and enters into each of the release agent non-formation regions 22. In this case, the adhesive layer 31 has an adhesive force corresponding to the peeling force in a portion in close contact with the peeling layer 21, and has an adhesive force of the adhesive layer 31 formed intermittently with the second sheet 13. .

  Therefore, FIG. 3 is an explanatory view of a partially peeled state of the superposed adhesive sheet of FIG. FIG. 3A shows a state immediately after the start of peeling, FIG. 3B is a sectional view taken along the line EE, and FIG. 3C is a sectional view taken along the line FF. In FIG. 3 (A), when the first sheet 12 of the overlapping adhesive sheet 11 shown in FIG. 1 (A) is pulled up from the peeling start end 17 at the lower right corner of the step portion 16 and peeling is started, the width direction EE As shown in FIGS. 3B and 3C, the adhesive of the adhesive layer 31 formed on the release layer 21 is separated from the release layer 21 in the cross section and the FF cross section in the longitudinal direction. Then, the adhesive flowing into the release agent non-forming region 22 is separated by being separated so as to be separated in the thickness direction.

  In this case, the adhesive layer 31 formed in the release agent non-formed region 22 has an elongated rectangular shape, and its longitudinal direction is substantially the same as the peeling direction Toff. Thus, the area of the adhesive layer 31 which is peeled off at the time of opening is reduced, so that separation between layers due to destruction becomes easy, and paper breakage can be prevented.

  Next, FIG. 4 shows an explanatory view of another embodiment of the superposed adhesive sheet according to the present invention. FIG. 4 is different from the above embodiment in that the shape of the release agent non-formation region 22 is different, is basically elongated, and its longitudinal direction is formed in substantially the same direction as the peeling direction Toff.

  That is, the release agent non-forming region 22A shown in FIG. 4A is formed in a slender triangular shape having the vertex at the peeling end side in the peeling direction Toff, and the longitudinal direction is formed in substantially the same direction as the peeling direction Toff. Things. The release agent non-forming region 22B shown in FIG. 4 (B) is formed in an elongated elliptical shape, and its longitudinal direction is formed in substantially the same direction as the peeling direction Toff. Further, the release agent non-forming region 22C shown in FIG. 4 (C) is formed in an elongated rhombus shape, and its longitudinal direction is formed in substantially the same direction as the peeling direction Toff.

  As described above, by forming the shape of the release agent non-formed areas 22A to 22C so that the longitudinal direction thereof is formed in substantially the same direction as the peeling direction Toff, the adhesive layer 31 becomes elongated in the peeling direction as described above, and The area of the adhesive layer 31 that is sometimes peeled off is reduced, so that separation between layers due to destruction is easily performed, and paper breakage can be prevented.

  By the way, in the above-described embodiment, the case where the release layer 21 (the release agent non-formed areas 22, 22A to 22C) and the adhesive layer 31 are formed on the second paper sheet 13 is shown. The same is true for both.

  Further, in the above-described embodiment, the description has been given of the two-ply superimposed adhesive sheet. However, the same applies to the case where the Z-fold is performed on three pieces of paper (a piece of paper a, b piece of paper, and c piece of paper). That is, the a-paper piece is referred to as the first paper piece 12 and the b-paper piece is referred to as the second paper piece 13 on three sides other than the sides of the folded portion of the first surface (the surface to be overlapped with the a-paper piece) of the b-paper piece. A release layer 21 (release agent non-formed areas 22, 22A to 22C) and an adhesive layer 31 are formed on each other and are superimposed on each other. Further, this is used as a first paper sheet 12, and a c paper sheet is used as a second paper sheet 13. Layers 21 (release agent-free areas 22, 22A to 22C) and an adhesive layer 31 are formed on three sides other than the sides of the folded portion of the surface, and the first paper sheet 12 (a paper sheet and a b paper sheet which are superimposed and bonded) is formed. B) to form a superimposed adhesive sheet 11 by superimposing on the second surface (the back surface of the first surface) of the piece of paper b.

  Further, in the above-described embodiment, the overlapped adhesive sheet 11 of two paper pieces has been described. However, when this is applied to a booklet (for example, a single leaf a piece of paper, a piece of b paper, or a piece of c paper), first, the piece of a paper is first attached to the first piece of paper. The paper sheet 12 and the paper sheet b are used as the above-mentioned second paper sheet 13, and the release layer 21 (without the release agent) is attached to three sides other than the side of the joint of the first surface of the b paper sheet (the surface to be overlapped with the paper sheet a). The formation areas 22, 22A to 22C) and the adhesive layer 31 are formed and overlapped, and this is further referred to as a first paper sheet 12, and the c paper sheet is used as the second paper sheet 13, except for the side of the joining portion on the superposed surface of the c paper sheet. On the three sides, the release layer 21 (the release agent non-formed areas 22, 22A to 22C) and the adhesive layer 31 are formed, and the second surface (the b-side paper piece) of the first paper sheet 12 (the a-paper sheet and the b-paper sheet that are superimposed and bonded) ( (The back side of the first side) It is intended to be the root aligned adhesive sheet 11.

  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 1st paper piece 13 2nd paper piece 14 Folding part 15 Lamination extension part 16 Step part 17 Peeling start end 21 Peeling layer 22 Release agent non-forming area 31 Adhesive layer

Claims (1)

At least the first and second pieces of paper to be overlapped and bonded are bonded together at the other three sides with one side of the edge being a folded or joined part, and peeled diagonally from the peeling start end of any corner A laminated adhesive sheet to be peeled and opened in the peel direction applied to the terminal,
What Re of the three sides of the first paper and the second paper, substantially release agent non-forming region of the shape in the same direction in the longitudinal direction and the peeling direction of the elongated shape is formed intermittently provided A release layer;
An adhesive layer formed by applying an adhesive to at least the release agent non-formed area,
A superimposed adhesive sheet comprising:

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