JP2011186259A - Laminated label - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a laminated label wherein irregularities hardly appear on the external face of a sheet and the side part of the sheet hardly becomes turned up. <P>SOLUTION: The laminated label 10 includes an upper sheet 1, all over the surface of which a plurality of strong adhesive layers 12 and weak adhesive layers 13 are alternately formed, and a lower sheet 2, all over the surface of which a plurality of strong adhesive layers 22 and weak adhesive layers 23 are alternately formed. The upper sheet 1 and the lower sheet 2 are overlapped so that the surface of each strong adhesive layer 12 of the upper sheet 1 may confront the surface of each weak adhesive layer 23 of the lower sheet 2 respectively, and that the surface of each strong adhesive layer 22 of the lower sheet 2 may confront the surface of each weak adhesive layer 13 of the upper sheet 1 respectively. The thickness of the strong adhesive layer 12 of the upper sheet 1 is nearly the same as the thickness of the weak adhesive layer 13 of the upper sheet 1, and the thickness of the strong adhesive layer 22 of the lower sheet 2 is nearly the same as the thickness of the weak adhesive layer 23 of the lower sheet 2. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a laminated label capable of obtaining a tack label by peeling off two laminated sheets.

  Conventionally, as shown in FIG. 6, an upper sheet 110 in which a plurality of strip-like pressure-sensitive adhesive layers 112 and release agent layers 113 are alternately arranged on the inner surface, and a plurality of belt-like pressure-sensitive adhesive layers 122 and release agent layers 123 on the inner surface. Alternately disposed lower sheets 120, and the upper sheet 110 such that the surface of the strip-like pressure-sensitive adhesive layer of one sheet faces the surface of the strip-like release agent layer of the other sheet A laminated label 100 in which a lower sheet 120 is overlaid is known (for example, Patent Document 1).

In the laminated label 100, since the upper sheet 110 and the lower sheet 120 are overlapped with the surfaces of the release agent layer and the adhesive layer facing each other, the upper sheet 110 and the lower sheet 120 are easily pulled. Can be peeled off.
As shown in FIG. 7, the peeled upper sheet 110 (and lower sheet 120) can be attached to an adherend A such as a container via the surface of the adhesive layer 112. For this reason, by performing desired printing etc. on the upper sheet 110 and the lower sheet 120, both sheets can be used as a tack label for display.

However, when the upper sheet 110 (and the lower sheet 120) of the conventional laminated label 100 is attached to the adherend A, the sheet corresponds to the region where the release agent layer 113 (release agent layer 123) is provided. As shown in FIG. 7, there is a problem that a dent is generated on the outer surface.
On the outer surface of the sheet in which such a dent has occurred, a band-like dent appears in a multi-stage shape (a striped pattern consisting of irregularities appears). Since dust adheres to the stepped portion of the unevenness to produce a black and dirty striped pattern, improvement thereof is required.

  Furthermore, a strip-shaped release agent layer is necessarily present on the inner surface of one side of the upper sheet 110 and the inner surface of one side of the lower sheet 120. For this reason, when the peeled upper sheet 110 and lower sheet 120 are stuck to the adherend A, as shown in FIG. 7, one side B of the sheet is not stuck, and the part is rolled up. There is also a point.

JP-A-6-274104

A first object of the present invention is to provide a laminated label in which unevenness hardly appears on the outer surface of a sheet after being attached to an adherend.
The second object of the present invention is to provide a laminated label in which the side portion of the sheet is difficult to bend after being attached to an adherend.

In the conventional laminated label, the pressure-sensitive adhesive layer and the release agent layer are alternately disposed on the upper sheet and the lower sheet, respectively. The pressure-sensitive adhesive layer must adhere to the adherend with sufficient adhesive strength. In order to exert such a sufficient adhesive force, it is necessary to form the pressure-sensitive adhesive layer relatively thick. On the other hand, the release agent layer is not required to substantially adhere to the surface of the pressure-sensitive adhesive layer, and is formed by applying a liquid containing the release agent. For this reason, the release agent layer is formed sufficiently thinner than the pressure-sensitive adhesive layer. Therefore, there is a large difference in thickness between the pressure-sensitive adhesive layer and the release agent layer, and as a result, a large step is generated on the inner surfaces of the upper sheet and the lower sheet (this step is the surface of the pressure-sensitive adhesive layer and the surface of the release agent layer). And the difference in height). Due to such a large step, when the peeled sheet is attached, irregularities appear on the outer surface.
The present inventors have found a means that can solve the above-described problems under such cause elucidation.

  The laminated label of the present invention includes a strong pressure-sensitive adhesive layer and an upper sheet in which a plurality of weak pressure-sensitive adhesive layers having lower adhesive strength than the strong pressure-sensitive adhesive layer are alternately provided on one side, a strong pressure-sensitive adhesive layer, and the strong pressure-sensitive adhesive. A plurality of weak adhesive layers having lower adhesive strength than the lower sheet, and a plurality of lower adhesive sheets provided alternately on one side, and the surface of each strong adhesive layer of the upper sheet is each weak adhesive of the lower sheet. The upper sheet and the lower sheet are overlapped so as to face the surface of the adhesive layer and the surface of each strong adhesive layer of the lower sheet faces the surface of each weak adhesive layer of the upper sheet, respectively. The thickness of the strong adhesive layer of the upper sheet and the thickness of the weak adhesive layer of the upper sheet are substantially the same, and the thickness of the strong adhesive layer of the lower sheet and the weak adhesive layer of the lower sheet Are substantially the same thickness.

  In the preferred laminated label of the present invention, the strong pressure-sensitive adhesive layer and the weak pressure-sensitive adhesive layer of the upper sheet are provided in a planar view extending in one direction of the upper sheet, and the strong pressure-sensitive adhesive layer of the lower sheet and The weak pressure-sensitive adhesive layer is provided in a planar view band shape extending in one direction of the lower sheet.

In the laminated label of the present invention, the thickness of the strong pressure-sensitive adhesive layer of the upper sheet and the thickness of the weak pressure-sensitive adhesive layer are substantially the same. For this reason, a big level | step difference does not arise in the inner surface of an upper sheet | seat, Therefore After an upper sheet | seat is affixed on a to-be-adhered body, an unevenness | corrugation cannot appear easily on the outer surface of an upper sheet | seat.
In addition, the weak pressure-sensitive adhesive layer can adhere to the surface of the adherend although the adhesive strength is small. Accordingly, almost the entire inner surface of the upper sheet adheres to the surface of the adherend, so that the side portion of the upper sheet is difficult to roll. Since the conventional laminated label is provided with a stripping agent layer in a strip shape, the side portion of the sheet is easy to bend, but the laminated label of the present invention is provided with a strong adhesive layer and a weak adhesive layer in a planar view. Even if it is a case, it can suppress that the side part of a sheet | seat is curled.
These matters are the same for the lower sheet.

In the preferred laminated label of the present invention, each of the strong pressure-sensitive adhesive layers of the upper sheet and the lower sheet is formed from a strong pressure-sensitive adhesive mainly composed of an acrylic resin or a styrene rubber, and the upper sheet and the lower sheet Each weak pressure-sensitive adhesive layer is formed of a weak pressure-sensitive adhesive mainly composed of styrene rubber or acrylic resin, as opposed to the strong pressure-sensitive adhesive layer.
Note that “the weak adhesive layer is opposite to the strong adhesive layer” means that each of the strong adhesive layers of the upper sheet and the lower sheet is formed of a strong adhesive mainly composed of an acrylic resin. In this case, each weak pressure-sensitive adhesive layer of the upper sheet and the lower sheet is formed of a weak pressure-sensitive adhesive mainly composed of styrene rubber, while each of the strong pressure-sensitive adhesive layers of the upper sheet and the lower sheet is made of styrene rubber. When it is formed from a strong pressure-sensitive adhesive having a main component, it means that each weak pressure-sensitive adhesive layer of the upper sheet and the lower sheet is formed from a weak pressure-sensitive adhesive having an acrylic resin as a main component.

  In the preferable laminated label, the interface between the strong pressure-sensitive adhesive layer and the weak pressure-sensitive adhesive layer is easily peeled off, so that the upper sheet and the lower sheet can be easily peeled off.

In the laminated label of the present invention, the upper sheet and the lower sheet can be peeled off, and this sheet can be attached to the adherend. A striped pattern is unlikely to appear on the outer surface of the attached sheet. Therefore, according to the present invention, a tack label having a beautiful appearance can be provided.
Moreover, after affixing an upper sheet and a lower sheet to a to-be-adhered body, it can prevent that the side part falls.

The partial omission plan view of the lamination label concerning one embodiment of the present invention. The II-II sectional view taken on the line of FIG. 1 (sectional drawing cut | disconnected in the direction orthogonal to one direction). A reference sectional view showing a state where an upper sheet and a lower sheet are peeled off, and an upper sheet is stuck on an adherend. Sectional drawing which cut | disconnected the laminated label which concerns on the modification of this invention in the direction orthogonal to the one direction. It is a top view which shows the modification of the formation pattern of the strong adhesive layer of the lamination | stacking label of this invention, and a weak adhesive layer, Comprising: The partially abbreviated top view seen from the inner surface side of the upper sheet | seat. A reference sectional view of a conventional laminated label. In the conventional laminated label, reference sectional drawing which shows the state which peeled off the upper sheet and the lower sheet, and affixed the upper sheet on the to-be-bonded body.

Embodiments of the present invention will be described below with reference to the drawings. However, in each figure, it should be noted that the thickness of the base material, the strong pressure-sensitive adhesive layer, the weak pressure-sensitive adhesive layer, and the like, and the sizes thereof are different from the actual ones.
Further, in the present specification, for the purpose of distinguishing two sheets in terms of terms, a sheet illustrated on the upper side is referred to as an “upper sheet” and a sheet illustrated on the lower side is referred to as a “lower sheet”. That's it.

1 and 2, reference numeral 10 denotes a laminated label in which an upper sheet 1 and a lower sheet 2 are overlaid.
The upper sheet 1 includes a base material 11, a plurality of strong pressure-sensitive adhesive layers 12 provided on one surface of the base material 11, and a plurality of weak pressure-sensitive adhesive layers 13.
The lower sheet 2 includes a base material 21, a plurality of strong pressure-sensitive adhesive layers 22 provided on one surface of the base material 21, and a plurality of weak pressure-sensitive adhesive layers 23.
Hereinafter, the upper base material 11, the upper strong pressure-sensitive adhesive layer 12, and the upper weak pressure-sensitive adhesive layer 13 refer to the base material 11, the strong pressure-sensitive adhesive layer 12 and the weak pressure-sensitive adhesive layer 13 of the upper sheet 1, and the lower base material 21, The lower strong pressure-sensitive adhesive layer 22 and the lower weak pressure-sensitive adhesive layer 23 refer to the base material 21, the strong pressure-sensitive adhesive layer 22, and the weak pressure-sensitive adhesive layer 23 of the lower sheet 2.
The upper weak pressure-sensitive adhesive layer 13 and the lower weak pressure-sensitive adhesive layer 23 have lower adhesive strength than the upper strong pressure-sensitive adhesive layer 12 and the lower strong pressure-sensitive adhesive layer 22. Such weak pressure-sensitive adhesive layers 13 and 23 can be formed using a weak pressure-sensitive adhesive having a lower adhesive strength than the strong pressure-sensitive adhesive forming the strong pressure-sensitive adhesive layers 12 and 22.

Specifically, the upper and lower substrates 11 and 21 are not particularly limited. For example, a synthetic resin film, paper, synthetic paper, a foamed resin film, a metal vapor deposition film, a nonwoven fabric, or a laminate (for example, Synthetic resin film and paper laminate, etc.).
As the synthetic resin film, since it is excellent in rigidity, it is preferable to use a synthetic resin film such as a polyester type such as a polyethylene terephthalate film, a polyamide type, or a polyolefin type such as polypropylene. It is more preferable to use a film.
The upper and lower substrates 11 and 21 may be either transparent or non-transparent films. The upper and lower substrates 11 and 21 are usually formed from the same film, but may be formed from different films.

  The thicknesses of the upper and lower base materials 11 and 21 are not particularly limited. For example, when synthetic resin films are used as the upper and lower substrates 11 and 21, the thickness is usually about 10 to 100 μm, preferably about 15 to 80 μm.

  Since the upper sheet 1 and the lower sheet 2 are used as tack labels, respectively, the upper and lower base materials 11 and 21 are subjected to desired design printing such as a trade name and a picture as necessary. (Not shown). Design printing may be performed on any of the inner and outer surfaces of the upper and lower substrates 11 and 21. Here, the inner surface refers to a surface on the side where the upper sheet 1 and the lower sheet 2 are overlapped with each other, and the outer surface refers to a surface on the side where the upper sheet 1 and the lower sheet 2 are not overlapped. Preferably, the design printing is performed on the outer surface sides of the upper and lower substrates 11 and 21. Because, when design printing is performed on the inner surfaces of the upper and lower base materials 11 and 21, a strong pressure-sensitive adhesive layer and a weak pressure-sensitive adhesive layer are formed on the surface of the design printing layer. It is because it may become difficult to apply the pressure-sensitive adhesive when the printing layer is interposed.

The plan view shapes of the upper and lower base materials 11 and 21 (upper sheet 1 and lower sheet 2) are not particularly limited, and are set to desired shapes such as a substantially rectangular shape, a substantially circular shape, and a substantially elliptical shape. .
However, it is preferable that the upper and lower base materials 11 and 21 are formed in a long shape because the productivity is good and the paper can be rolled and supplied to the labeler.

  In the present embodiment, the upper and lower base materials 11 and 21 (upper sheet 1 and lower sheet 2) have a rectangular shape in which one direction X is sufficiently longer than the other direction Y (that is, a long length). Formed). However, the one direction X and the other direction Y are directions orthogonal to each other in the plane of the sheet. Thus, the lamination | stacking label 10 which consists of the elongate upper sheet | seat 1 and the lower sheet | seat 2 is elongate similarly. In use, a plurality of sheet-like tack labels can be obtained by cutting or sequentially punching the long laminated label 10 into a desired shape.

  The lengths in the other direction Y (the width direction in the present embodiment) of the upper and lower base materials 11 and 21 are preferably the same length. But the length of the other direction Y of any one of the upper side and lower side base materials 11 and 21 may be a little short.

Next, the upper strong pressure-sensitive adhesive layer 12 is formed by applying a pressure-sensitive adhesive to one surface (inner surface) of the upper base material 11 in a band shape. One upper strong adhesive layer 12 has a band shape in a plan view extending in one direction X of the upper base material 11. A plurality of such strip-shaped upper strong pressure-sensitive adhesive layers 12 are provided in a multi-stage shape with a predetermined interval in the other direction Y of the upper base material 11. The widths of the upper strong adhesive layers 12 are preferably the same.
The upper weak pressure-sensitive adhesive layer 13 is formed by applying a weak pressure-sensitive adhesive in a strip shape between the plurality of upper strong pressure-sensitive adhesive layers 12. One upper weak pressure-sensitive adhesive layer 13 has a band shape in a plan view extending in one direction X of the upper base material 11. A plurality of such strip-shaped upper weak pressure-sensitive adhesive layers 13 are provided in a multistage manner in the other direction Y of the upper base material 11 between the adjacent upper strong pressure-sensitive adhesive layers 12. The widths of the upper weak pressure-sensitive adhesive layers 13 are preferably the same.

  The numbers of the upper strong pressure-sensitive adhesive layer 12 and the upper weak pressure-sensitive adhesive layer 13 are not particularly limited, and are appropriately set according to the size of the label. Usually, these numbers are each 2 or more, preferably 3 or more, more preferably 4 or more. Preferably, the numbers of the upper strong pressure-sensitive adhesive layers 12 and the upper weak pressure-sensitive adhesive layers 13 are the same.

  Although the side edge of the upper strong pressure-sensitive adhesive layer 12 and the side edge of the upper weak pressure-sensitive adhesive layer 13 may be in contact with each other, it is preferable that both side edges are slightly separated as shown in FIG. When the side edges are separated, the strong adhesive and the weak adhesive can be easily applied. It is preferable that a gap between the side edge of the upper strong pressure-sensitive adhesive layer 12 and the side edge of the upper weak pressure-sensitive adhesive layer 13 is, for example, about 0.5 mm to 1 mm. Even with such an interval, the outer surface of the upper sheet 1 is not uneven.

The thickness T12 of the upper strong pressure-sensitive adhesive layer 12 and the thickness T13 of the upper weak pressure-sensitive adhesive layer 13 are substantially the same. The term “substantially the same” means, for example, the same when including a difference of ± 5 μm, preferably including a difference of ± 3 μm, and more preferably including a difference of ± 1 μm.
The specific numerical values of the thicknesses T12 and T13 of the upper strong adhesive layer 12 and the upper weak adhesive layer 13 are each preferably 15 μm or more, more preferably 20 μm or more, and particularly preferably 25 μm or more. On the other hand, since the effect is hardly changed even if it is formed very thick, the thickness T12 and T13 of the upper strong pressure-sensitive adhesive layer 12 and the upper weak pressure-sensitive adhesive layer 13 are each 50 μm or less for cost effectiveness. 40 μm or less.

Next, the lower strong pressure-sensitive adhesive layer 22 is formed by applying a strong pressure-sensitive adhesive to one surface (inner surface) of the lower base material 21 in a band shape. One lower strong pressure-sensitive adhesive layer 22 has a band shape in a plan view extending in one direction X of the lower base material 21. A plurality of such belt-like lower strong pressure-sensitive adhesive layers 22 are provided in a plurality of stages at predetermined intervals in the other direction Y of the lower base material 21. The widths of the lower strong pressure-sensitive adhesive layers 22 are preferably the same.
The lower weak pressure-sensitive adhesive layer 23 is formed by applying a weak pressure-sensitive adhesive in a strip shape between the plurality of lower strong pressure-sensitive adhesive layers 22. One lower weak pressure-sensitive adhesive layer 23 has a band shape in plan view extending in one direction X of the lower base material 21. A plurality of such belt-like lower weak pressure-sensitive adhesive layers 23 are provided in multiple stages in the other direction Y of the lower base material 21 between adjacent lower strong pressure-sensitive adhesive layers 22. The widths of the lower weak pressure-sensitive adhesive layers 23 are preferably the same.

  The numbers of the lower strong pressure-sensitive adhesive layer 22 and the lower weak pressure-sensitive adhesive layer 23 are not particularly limited, and are appropriately set according to the size of the label. Usually, these numbers are each 2 or more, preferably 3 or more, more preferably 4 or more. Preferably, the numbers of the lower strong pressure-sensitive adhesive layers 22 and the lower weak pressure-sensitive adhesive layers 23 are the same.

  The side edge of the lower strong pressure-sensitive adhesive layer 22 and the side edge of the lower weak pressure-sensitive adhesive layer 23 may be in contact with each other, but it is preferable that both side edges are slightly separated as shown in FIG. . When the side edges are separated, the strong adhesive and the weak adhesive can be easily applied. The gap between the side edge of the lower strong pressure-sensitive adhesive layer 22 and the side edge of the lower weak pressure-sensitive adhesive layer 23 preferably has an interval of about 0.5 mm to 1 mm, for example. Even with such an interval, the outer surface of the upper sheet 1 is not uneven.

The thickness T22 of the lower strong pressure-sensitive adhesive layer 22 and the thickness T23 of the lower weak pressure-sensitive adhesive layer 23 are substantially the same. The term “substantially the same” means, for example, the same when including a difference of ± 5 μm, preferably including a difference of ± 3 μm, more preferably including a difference of ± 1 μm.
Specific numerical values of the thicknesses T22 and T23 of the lower strong pressure-sensitive adhesive layer 22 and the lower weak pressure-sensitive adhesive layer 23 are each preferably 15 μm or more, more preferably 20 μm or more, and particularly preferably 25 μm or more. On the other hand, since the effect is hardly changed even if it is formed very thick, the thickness T22, T23 of the lower strong pressure-sensitive adhesive layer 22 and the lower weak pressure-sensitive adhesive layer 23 is 50 μm or less, respectively, for cost effectiveness. Preferably it is 40 micrometers or less.
The thickness T12, T13 of the upper strong pressure-sensitive adhesive layer 12 and the upper weak pressure-sensitive adhesive layer 13 and the thickness T22, T23 of the lower strong pressure-sensitive adhesive layer 22 and the lower weak pressure-sensitive adhesive layer 23 may be different. Since they are easy to form, it is preferable that they are substantially the same.

The width of each upper strong pressure-sensitive adhesive layer 12 and the width of each lower strong pressure-sensitive adhesive layer 22 are appropriately designed. The width is, for example, 2 to 10 mm, preferably 2 to 7 mm. Since it is easy to form, it is preferable that the width of each upper strong pressure-sensitive adhesive layer 12 and the width of each lower strong pressure-sensitive adhesive layer 22 are substantially the same.
The width of each upper weak pressure-sensitive adhesive layer 13 and the width of each lower weak pressure-sensitive adhesive layer 23 are appropriately designed. The width is, for example, 2 to 12 mm, and preferably 2 to 9 mm. Since it is easy to form, the width of each upper weak pressure-sensitive adhesive layer 13 and the width of each lower weak pressure-sensitive adhesive layer 23 are preferably substantially the same.

  In one embodiment, the width of the upper strong pressure-sensitive adhesive layer 12 is formed to be substantially the same as the width of the lower weak pressure-sensitive adhesive layer 23 facing, and the width of the lower strong pressure-sensitive adhesive layer 22 is the upper weak pressure-sensitive adhesive layer facing. It is formed to be approximately the same as the width of the agent layer 13. This is to prevent a part of the surface of the upper strong pressure-sensitive adhesive layer 12 and a part of the surface of the lower strong pressure-sensitive adhesive layer 22 from adhering to each other when the upper sheet 1 and the lower sheet 2 are overlapped. When a part of the upper strong pressure-sensitive adhesive layer 12 and the lower strong pressure-sensitive adhesive layer 22 face each other, the upper strong pressure-sensitive adhesive layer 12 and the lower strong pressure-sensitive adhesive layer 22 are strongly bonded to each other. is there.

  Further, as described above, the width of each upper strong pressure-sensitive adhesive layer 12 and the width of each lower weak pressure-sensitive adhesive layer 23, and the width of each upper weak pressure-sensitive adhesive layer 13 and the width of each lower strong pressure-sensitive adhesive layer 22. However, if they are formed to be substantially the same, theoretically, there is no problem when the upper sheet 1 and the lower sheet 2 are peeled off. However, it may be difficult in mechanical manufacturing to superimpose the upper sheet 1 and the lower sheet 2 so as not to be displaced at all. For example, when the two sheets are overlapped, the both sheets may be slightly displaced in the width direction. When the position is shifted as described above, the side portion of the surface of the upper strong pressure-sensitive adhesive layer 12 and the side portion of the surface of the lower strong pressure-sensitive adhesive layer 22 can come into contact with each other. Therefore, there is a possibility that the upper sheet 1 and the lower sheet 2 cannot be easily peeled off.

In order to prevent such a problem, in the preferred embodiment, the width of the upper strong pressure-sensitive adhesive layer 12 is formed slightly shorter than the width of the lower weak pressure-sensitive adhesive layer 23 facing each other, as shown in FIG. The width of the lower strong pressure-sensitive adhesive layer 22 is slightly shorter than the width of the upper weak pressure-sensitive adhesive layer 13.
When formed in this way, when the upper sheet 1 and the lower sheet 2 are overlapped, both side portions of the surface of the upper weak adhesive layer 13 and both side portions of the lower weak adhesive layer 23 overlap. For this reason, even if the upper sheet 1 and the lower sheet 2 are misaligned, the upper strong pressure-sensitive adhesive layer 12 and the lower strong pressure-sensitive adhesive layer 22 can be prevented from adhering.

The adhesive force to the adherend on the surface of the upper strong pressure-sensitive adhesive layer 12 and the surface of the lower strong pressure-sensitive adhesive layer 22 is 10 N / 25 mm or more, and preferably 15 N / 25 mm or more.
The adhesive force to the adherend on the surface of the upper weak pressure-sensitive adhesive layer 13 and the surface of the lower weak pressure-sensitive adhesive layer 23 is 0.5 to 3 N / 25 mm, preferably 0.5 to 1 N / 25 mm. .

  However, the said adhesive force means the value measured by the method according to 180 degree | times peeling of JISZ0237. Specifically, a base material having a pressure-sensitive adhesive layer (thickness 25 μm) formed on one surface is cut into 100 mm × 25 mm, and this is attached to a SUS plate (object to be bonded) in the longitudinal direction at a speed of 300 mm / min. The maximum stress value when the substrate is peeled off.

The peel strength between the surface of the upper strong pressure-sensitive adhesive layer 12 and the surface of the lower weak pressure-sensitive adhesive layer 23 is preferably 0.5 to 2 N / 25 mm.
The peel strength between the surface of the upper weak pressure-sensitive adhesive layer 13 and the surface of the lower strong pressure-sensitive adhesive layer 22 is preferably 0.5 to 2 N / 25 mm.
With such a peel strength, the upper sheet 1 and the lower sheet 2 can be easily peeled off.
The peel strength between the surface of the upper weak pressure-sensitive adhesive layer 13 and the surface of the lower weak pressure-sensitive adhesive layer 23 is preferably 0.5 to 2 N / 25 mm. As described above, in the preferred embodiment, when the upper sheet 1 and the lower sheet 2 are overlapped, both sides of the surface of the upper weak adhesive layer 13 and both sides of the lower weak adhesive layer 23 overlap. If the peel strength of the surfaces of the upper weak pressure-sensitive adhesive layer 13 and the lower weak pressure-sensitive adhesive layer 23 is within the above range, the side portions can be easily peeled off.

  However, the said peeling strength says the value measured by the method according to the said JISZ0237 180 degree peeling.

Pressure sensitive adhesives are used as the strong and weak adhesives that form the upper strong adhesive layer 12 and the lower strong adhesive layer 22 and the upper weak adhesive layer 13 and the lower weak adhesive layer 23, respectively. . The pressure-sensitive adhesive is an adhesive that has adhesiveness at room temperature and adheres to an adherend when pressed.
Examples of the pressure sensitive adhesive include an adhesive mainly composed of an acrylic resin, an adhesive mainly composed of a styrene rubber such as styrene isoprene rubber (SIS), and a urethane adhesive. In addition, a main component means the largest component (weight ratio) in the polymer contained in an adhesive.
Examples of the properties of the pressure-sensitive adhesive include an emulsion type, a solvent-soluble type, and a hot melt type.

  In the present invention, in order to form the upper weak pressure-sensitive adhesive layer 13 and the lower weak pressure-sensitive adhesive layer 23, for example, the adhesive strength is higher than that of the strong pressure-sensitive adhesive that forms the upper strong pressure-sensitive adhesive layer 12 and the lower strong pressure-sensitive adhesive layer 22. A weak pressure sensitive adhesive is used. The weak pressure-sensitive adhesive can be obtained by appropriately designing the amount of the main polymer, the type and amount of the tackifier, the type and amount of the cross-linking agent, the type and amount of the softener, etc., depending on the type. Therefore, it is possible to use a weak pressure-sensitive adhesive whose main component is the same polymer as that of the strong pressure-sensitive adhesive. For example, an adhesive mainly composed of an acrylic resin can be used as the weak adhesive and the strong adhesive.

However, when an adhesive mainly composed of the same kind of polymer is used as the weak adhesive and the strong adhesive, both are easily compatible with each other, and the upper strong adhesive layer 12 and the lower weak adhesive with the passage of time. There is a possibility that the interface between the layers 23 and the interface between the lower strong adhesive layer 22 and the upper weak adhesive layer 13 are difficult to peel off.
Therefore, it is preferable to use an adhesive having a different main component polymer for the weak adhesive and the strong adhesive.

Preferably, the upper weak pressure-sensitive adhesive layer 13 and the lower weak pressure-sensitive adhesive layer 23 are formed of a weak pressure-sensitive adhesive mainly composed of an acrylic resin, and the upper strong pressure-sensitive adhesive layer 12 and the lower strong pressure-sensitive adhesive layer 22 are formed. It is formed of a strong adhesive mainly composed of styrene rubber. Alternatively, the upper weak pressure-sensitive adhesive layer 13 and the lower weak pressure-sensitive adhesive layer 23 are formed of a weak pressure-sensitive adhesive mainly composed of styrene rubber, and the upper strong pressure-sensitive adhesive layer 12 and the lower strong pressure-sensitive adhesive layer 22 are It is formed with a strong adhesive mainly composed of an acrylic resin.
This is because the pressure-sensitive adhesive layer formed of the acrylic resin pressure-sensitive adhesive and the pressure-sensitive adhesive layer formed of the styrene rubber pressure-sensitive adhesive are particularly excellent in peelability at the interface.

  As described above, the upper sheet 1 and the lower sheet 2 can be formed in various forms, but since they are easy to manufacture, the upper sheet 1 and the lower sheet 2 are the same (base material, strong adhesive layer) And a specific structure of the weak pressure-sensitive adhesive layer) may be used.

The surface of each upper strong pressure-sensitive adhesive layer 12 faces the surface of each lower weak pressure-sensitive adhesive layer 23, and the surface of each lower strong pressure-sensitive adhesive layer 22 faces the surface of each upper weak pressure-sensitive adhesive layer 13, respectively. Thus, the inner surfaces of the upper sheet 1 and the lower sheet 2 are overlapped.
Thus, what laminated | stacked the upper sheet | seat 1 and the lower sheet | seat 2 is the lamination | stacking label 10 of this invention.

  When the upper sheet 1 and the lower sheet 2 are peeled off from the laminated label 10, the surfaces of the pressure-sensitive adhesive layers of the upper sheet 1 and the lower sheet 2 are exposed. By pressing the surface of each adhesive layer of the peeled upper sheet 1 against the adherend A, the upper sheet 1 can be attached to the adherend A (see FIG. 3). In addition, the lower sheet 2 can be similarly attached to the adherend A (not shown).

In the present invention, the thickness of the upper strong pressure-sensitive adhesive layer 12 and the thickness of the upper weak pressure-sensitive adhesive layer 13 are substantially the same. For this reason, it can prevent that an unevenness | corrugation appears in the outer surface of the upper sheet | seat 1 after affixing the upper sheet | seat 1 on a to-be-adhered body.
Further, the upper weak pressure-sensitive adhesive layer 13 can adhere to the surface of the adherend although the adhesive strength is small. Therefore, since almost the entire inner surface of the upper sheet 1 is adhered to the surface of the adherend, the side portion of the upper sheet 1 attached to the adherend can be prevented from curling.
The same applies to the case where the lower sheet 2 is stuck on the adherend.

In addition, the lamination | stacking label 10 of this invention is not restricted to the form shown above, It can change suitably. Hereinafter, although the modified example of this invention is demonstrated, about the structure similar to the said embodiment, the description is abbreviate | omitted and a term and a code | symbol are used.
In the above embodiment, the upper sheet 1 and the lower sheet 2 are separately independent. For example, as shown in FIG. 4, one side edge of the upper sheet 1 and the other side edge of the lower sheet 2 are connected. The laminated label 10 may be used. The laminated label 10 is the same as the laminated label 10 of the above embodiment except that the upper substrate 11 and the lower substrate 21 are made of a single substrate and are folded.

  In the above embodiment, the upper strong pressure-sensitive adhesive layer 12 and the upper weak pressure-sensitive adhesive layer 13, and the lower strong pressure-sensitive adhesive layer 22 and the lower weak pressure-sensitive adhesive layer 23 are all seen in a plan view extending in one direction X of the substrate. Although formed in a strip shape, each of these pressure-sensitive adhesive layers may be formed in a strip shape extending in the other direction Y of the base material, or may be formed in a strip shape extending in an oblique direction of the base material. . When each adhesive layer is formed in a strip shape, it only needs to extend in one direction.

  Furthermore, in the said embodiment, although the upper strong adhesive layer 12 and the upper weak adhesive layer 13, and the lower strong adhesive layer 22 and the lower weak adhesive layer 23 are formed in planar view belt shape (that is, The strong pressure-sensitive adhesive layer and the weak pressure-sensitive adhesive layer are provided so as to draw a stripe pattern alternately), but the upper strong pressure-sensitive adhesive layer 12 and the upper weak pressure-sensitive adhesive layer 13 as well as the lower strong pressure-sensitive adhesive layer 22 and the lower weak pressure layer. The formation pattern of the pressure-sensitive adhesive layer 23 is not limited to a planar band shape. In the laminated label 10 of the present invention, when the upper sheet 1 and the lower sheet 2 are overlapped, the surface of the strong adhesive layer 12 of the upper sheet 1 faces the surface of the weak adhesive layer 23 of the lower sheet 2. In addition, the upper strong pressure-sensitive adhesive layer 12, the upper weak pressure-sensitive adhesive layer 13 and the lower strong pressure-sensitive adhesive layer 22 are arranged so that the surface of the strong pressure-sensitive adhesive layer 22 of the lower sheet 2 faces the surface of the weak pressure-sensitive adhesive layer 13 of the upper sheet 1 respectively. The adhesive layer 22 and the lower weak adhesive layer 23 should just be provided.

  For example, as shown in FIG. 5, the upper strong pressure-sensitive adhesive layer 12 and the upper weak pressure-sensitive adhesive layer 13 are formed in a substantially rectangular shape in plan view, and these are spaced apart in one direction and the other direction of the upper base material 11. It is also possible to use the upper sheets 1 arranged alternately. 5 is a plan view of the upper sheet 1 as viewed from the inner surface side. In order to facilitate understanding, the range in which the upper strong pressure-sensitive adhesive layer 12 is provided in FIG. In FIG. 5, only the upper sheet 1 is shown. Similarly, the lower sheet 2 stacked on the upper sheet 1 similarly has a lower strong pressure-sensitive adhesive layer 22 and a lower weak pressure-sensitive adhesive having a rectangular shape in plan view. The layers 23 are arranged alternately at predetermined intervals in one direction and the other direction of the lower base material 21 (not shown).

  The laminated label of the present invention can be used as a tack label to be attached to various products such as a packaging box, a packaging bag, a beverage container, and a food container.

  DESCRIPTION OF SYMBOLS 1 ... Upper sheet, 11 ... Base material of upper sheet, 12 ... Strong adhesive layer of upper sheet, 13 ... Weak adhesive layer of upper sheet, 2 ... Lower sheet, 21 ... Substrate of lower sheet, 22 ... Strong adhesive layer on the lower sheet, 23 ... Weak adhesive layer on the lower sheet, 10 ... Laminated label

Claims (3)

An upper sheet in which a plurality of strong pressure-sensitive adhesive layers and weak pressure-sensitive adhesive layers having a smaller adhesive strength than the strong pressure-sensitive adhesive layer are alternately provided on one side, and a pressure-sensitive adhesive force smaller than that of the strong pressure-sensitive adhesive layer and the strong pressure-sensitive adhesive layer A lower sheet provided with a plurality of weak adhesive layers alternately on one side,
The surface of each strong adhesive layer of the upper sheet faces the surface of each weak adhesive layer of the lower sheet, and the surface of each strong adhesive layer of the lower sheet is each weak adhesive of the upper sheet. The upper sheet and the lower sheet are superimposed so as to face the surface of the agent layer,
The thickness of the strong adhesive layer of the upper sheet and the thickness of the weak adhesive layer of the upper sheet are substantially the same, and the thickness of the strong adhesive layer of the lower sheet and the thickness of the weak adhesive layer of the lower sheet are substantially the same. The same, laminated label.   Each of the strong pressure-sensitive adhesive layers of the upper sheet and the lower sheet is formed from a strong pressure-sensitive adhesive mainly composed of acrylic resin or styrene rubber, and each of the weak pressure-sensitive adhesive layers of the upper sheet and the lower sheet is 2. The laminated label according to claim 1, wherein the laminated label is formed from a weak adhesive mainly comprising styrene rubber or acrylic resin as opposed to the strong adhesive layer.   The strong adhesive layer and the weak adhesive layer of the upper sheet are provided in a planar view extending in one direction of the upper sheet, and the strong adhesive layer and the weak adhesive layer of the lower sheet are provided on the lower side. The laminated label according to claim 1 or 2, which is provided in a planar view band shape extending in one direction of the sheet.

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