Protective sheet, press-through package

Abstract

To achieve a child-resistant function with a simple structure.SOLUTION: A protective sheet 30A is attached to a press-through package 10 having a sheet-like container 13 including a plurality of storage parts 12, and a lid material 14 for sealing the plurality of storage parts 12. The protective sheet includes: a resin layer 36 which can be peeled from the press-through package 10, and which has, at each storage part 12, a plurality of slits 37 which allows for starting peeling; and a first adhesive layer 38 which is adhered to the resin layer 36, and in which a surface on the opposite side from the resin layer 36 can be adhered to the lid material 14.SELECTED DRAWING: Figure 6

Description

Technical Field

[0001] The present technology relates to a protective sheet and a press-through package.

Background Art

[0002] Conventionally, a press-through package (PTP) is known as a packaging material having a housing portion for housing an object to be housed such as a drug. In recent years, in PTP, a child resistance function for preventing a child from accidentally opening it has been proposed, and an example thereof is disclosed in Patent Document 1. The PTP (PTP package) described in Patent Document 1 includes a lid material including a base material layer containing a press-through aluminum foil (aluminum foil) and a cover film laminated on the base material layer in a peelable state. Further, a non-adhesive treatment region where no adhesion treatment is performed is formed at the interface between the base material layer at the end of the lid material and the cover film. When opening the PTP, by using the cover film at the portion where the non-adhesive treatment region is formed as a gripping margin, it cannot be easily opened by a child.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the PTP described in Patent Document 1, since the laminated structure of the lid material is complicated, the manufacturing process inevitably becomes complicated. In addition, there is a concern that peeling occurs at the interface between other layers (for example, between the aluminum foil of the base material layer and the adjacent layer) in addition to the adhesion portion between the cover film having the gripping margin and the base material layer, and the peeling of the cover film becomes unstable.

[0005] The present technology has been completed based on the above circumstances, and aims to achieve a child resistance function with a simple structure.

Means for Solving the Problems

[0006] The means for solving the above problems are as follows.

[0007] <1>A protective sheet that is attached to a press-through package having a sheet-like container including a plurality of accommodating portions and a lid material for sealing the plurality of accommodating portions, is peelable from the press-through package, and has a resin layer having a plurality of slits serving as a trigger for peeling for each of the accommodating portions, and a first adhesive layer that is adhered to the resin layer and whose surface on the side opposite to the resin layer is adhesively attachable to the lid material.

[0008] <2>The plurality of slits are provided in two for each of the accommodating portions so as to face each other in a manner sandwiching a portion of the resin layer that overlaps with the accommodating portion in a plan view, and each slit is elongated so as to extend from a part of the outer peripheral edge of the resin layer in a direction intersecting with the outer peripheral edge. The protective sheet according to <1> above.

[0009] <3>On the surface of the resin layer on the side of the first adhesive layer, a cut is provided so as to connect the extending ends of the two slits provided for each. The protective sheet according to <2> above.

[0010] <4>The planar shape of the resin layer is rectangular as a whole, and each slit extends along the short side direction from a part of the long side of the outer peripheral edge. The protective sheet according to <2> or <3> above.

[0011] <5>The planar shape of the resin layer is rectangular as a whole, and each slit extends along the long side direction from a part of the short side of the outer peripheral edge. The protective sheet according to <2> or <3> above.

[0012] <6>The protective sheet according to any one of <1> to <5> above, wherein the first adhesive layer is an adhesive or an adhesive tape made of an acrylic-based, urethane-based, silicone-based, or rubber-based material.

[0013] <7>The protective sheet according to any one of <1> to <6> above, comprising a metal layer disposed on the side opposite to the first adhesive layer with respect to the resin layer, and an IC mounted at a position overlapping at least a part of the slit in a plan view on the metal layer for communicating with an external device.

[0014] <8>The protective sheet according to any one of <1> to <7> above, comprising a release paper disposed on the side opposite to the resin layer with respect to the first adhesive layer, and the release paper is peeled off from the first adhesive layer to expose the first adhesive layer before being attached to the lid member.

[0015] <9>A press-through package including the protective sheet according to any one of <1> to <7> above.

[0016] <10>The press-through package according to <9> above, wherein the planar shape and planar size of the protective sheet are substantially the same as those of the sheet-like container and the lid member.

Advantages of the Invention

[0017] According to the present technology, a child resistance function can be realized with a simple structure.

Brief Description of the Drawings

[0018]

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Mode for Carrying Out the Invention

[0019] <Embodiment 1> Embodiment 1 will be described with reference to FIGS. 1 to 7. In this embodiment, a protective sheet 30A and a press-through package (PTP, an example of a packaging material) 10 to which this is attached will be exemplified. Note that in some of the drawings, the X-axis, Y-axis, and Z-axis are shown, and the directions of the respective axes are drawn so as to be common directions in each drawing.

[0020] As shown in FIG. 1, the PTP 10 includes a PTP main body 11 that houses an object to be housed T (such as a tablet medicine) and a protective sheet 30A that is attached to the PTP main body 11. As shown in FIGS. 2 and 3, the PTP main body 11 includes a sheet-like container 13 provided with a housing portion 12 for housing the object to be housed T and a lid member 14 that is attached so as to cover the opening 12A of the housing portion 12 and seals the housing portion 12. The planar shape of the PTP main body 11 is rectangular (rectangular), and the protective sheet 30A also has a planar shape following this. Further, the planar size of the protective sheet 30A is set to a size that can cover the entire PTP main body 11, and in this embodiment, the planar sizes of both are substantially the same.

[0021] As shown in FIGS. 2 and 3, the sheet-like container 13 is formed with a plurality of accommodating portions 12 that are recessed (projected in a substantially hemispherical shape) on the side opposite to the lid material 14. The sheet-like container 13 is formed by processing a resin sheet having a thickness of about 60 μm to 400 μm into a predetermined shape. The sheet-like container 13 is a known resin container for PTP and is made of a transparent thermoplastic resin such as polyvinyl chloride, polyvinylidene chloride, polypropylene, or amorphous polyethylene terephthalate. The planar shape of each accommodating portion 12 is circular following the shape of the object T to be accommodated. In this embodiment, for example, 10 accommodating portions 12 are formed, five in the X-axis direction (long side direction) at a predetermined interval and two in the Y-axis direction (short side direction) at a predetermined interval.

[0022] The lid material 14 is a flat sheet-like member made of a thin material that can be press-through. Except for the portion covering the opening 12A of the accommodating portion 12, the lid material 14 is bonded to the sheet-like container 13 as shown in FIG. 3. The lid material 14 has a structure in which a heat-sealing adhesive layer 15, an aluminum foil 16, and an overcoat layer 18 are laminated in this order from the side of the sheet-like container 13. The heat-sealing adhesive layer 15 adheres the lid material 14 to the sheet-like container 13 and seals the accommodating portion 12. The heat-sealing adhesive layer 15 is made of a known heat adhesive for PTP, and for example, a polyester-based adhesive, a polypropylene-based adhesive, a vinyl chloride-based adhesive, etc. can be used. The overcoat layer 18 is a protective layer made of a transparent resin and protects the aluminum foil 16.

[0023] As shown in FIG. 1, the protective sheet 30A is attached to the sheet surface of the lid member 14 of the PTP main body 11. As shown in FIG. 5, a release paper 50 is attached to the surface of the weak adhesive layer 38 (an example of the first adhesive layer) that constitutes the lower surface of the protective sheet 30A before it is attached to the lid member 14. By peeling the release paper 50 from the weak adhesive layer 38, the weak adhesive layer 38 is exposed, and the exposed weak adhesive layer 38 is attached to the lid member 14 as shown in FIG. 6. In this specification, the unsealing detection sheet in the state where the release paper 50 is peeled off is denoted by the reference numeral 30A, and the unsealing detection sheet in the state before the release paper 50 is peeled off is denoted by the reference numeral 30. The unsealing detection sheet 30 can be stored and distributed as a single unit (separate body) before being attached to the PTP main body 11 because the release paper 50 is provided.

[0024] As shown in FIGS. 5 and 6, the protective sheet 30A is a laminate of a resin layer 36 and a weak adhesive layer 38. As shown in FIG. 6, the weak adhesive layer 38 adheres the resin layer 36 and the lid member 14 of the PTP main body 11. Also, before the protective sheet 30A is attached to the PTP main body 11, the weak adhesive layer 38 adhesively attaches the resin layer 36 and the release paper 50 in a peelable manner. The weak adhesive layer 38 is made of, for example, an acrylic-based, urethane-based, silicone-based, or rubber-based adhesive or adhesive tape. The resin layer 36 is a resin sheet that can adhere to the weak adhesive layer 38 and is made of a resin such as PET (polyethylene terephthalate), polystyrene, polyurethane, polypropylene, polyimide, or the like. The resin layer 36 preferably has a thickness equal to or greater than a predetermined value so that it can be easily grasped by the user when peeled off.

[0025] As shown in FIGS. 4 and 6, a plurality of first slits 37 and a plurality of half-cuts 39 are formed in the resin layer 36 and the weak adhesive layer 38. The first slit 37 penetrates the resin layer 36 and the weak adhesive layer 38, but it is sufficient that it penetrates at least the resin layer 36. Each first slit 37 extends in an elongated shape (more specifically, an I-shape) along the short side direction (the direction intersecting the long side of the outer peripheral edge 36A) from a part of the long side of the outer peripheral edge 36A of the resin layer 36 having a rectangular shape when viewed in plan. One end 37A of each first slit 37 reaches the outer peripheral edge 36A of the resin layer 36. Thus, the user can peel the resin layer 36 along the first slit 37 from the one end 37A side using the one end 37A as a starting point for peeling. Further, two first slits 37 are provided for each accommodating portion 12 so as to face each other with a portion overlapping the outer peripheral edge (the opening edge of the opening 12A) of the accommodating portion 12 sandwiched therebetween within the plane of the resin layer 36. Thus, as shown in FIG. 7, the user can easily peel and lift up the protective sheet 30A covering the accommodating portion 12 to be opened.

[0026] As shown in FIG. 4, cuts (so-called half-cuts) 39 are formed in the resin layer 36 and the weak adhesive layer 38 so as to connect the extending ends (the other ends) 37B of the two first slits 37 provided for each accommodating portion 12. The half-cut 39 is a cut that penetrates the weak adhesive layer 38 and is formed to a depth of about half of the layer thickness from the surface on the weak adhesive layer 38 side in the resin layer 36. Thus, as shown in FIG. 7, when the protective sheet 30A covering the accommodating portion 12 to be opened is peeled and lifted up, the peeled portion easily bends along the half-cut 39, and it becomes easier to maintain the state where the lid member 14 is exposed.

[0027] According to the PTP10 described above, the user can open the PTP10 by peeling off the protective sheet 30A covering the storage part 12 to be opened, and then pushing the object T stored in the storage part 12 toward the lid member 14 to break the lid member 14. Since a two-step operation of peeling and then pushing is required when opening the PTP10, it is difficult for children to accidentally open it, and a child resistance function can be realized. Further, the peeling operation added to realize the child resistance function can be easily performed by the first slit 37 and the half cut 39, so the burden on the user is small. Therefore, the PTP10 is a packaging material that is difficult for children to open while reducing the opening burden on the user (adult).

[0028] Further, the protective sheet 30A does not have a complicated laminated structure and can be widely used (attached) to a general PTP main body 11, so the manufacturing processes of the protective sheet 30A and the PTP10 are not complicated. According to the protective sheet 30A, a child resistance function can be realized with a simple structure.

[0029] <Embodiment 2> The protective sheet 130A according to Embodiment 2 and the PTP110 to which it is attached will be described with reference to FIGS. 8 and 9. The protective sheet 130A is different from Embodiment 1 in that an upper strong adhesive layer 34A, a base material layer 35, a lower strong adhesive layer 34B, and a metal layer 32 are laminated on the resin layer 36, and an IC (Integrated Circuit) 40 for communicating with an external communication device is mounted on the metal layer 32. In Embodiment 2, redundant descriptions of the same configurations, operations, and effects as in Embodiment 1 are omitted.

[0030] As shown in FIG. 9, the protective sheet 130A has a weak adhesive layer 38, a resin layer 36, a lower strong adhesive layer 34B, a base material layer 35, an upper strong adhesive layer 34A, and a metal layer 32 laminated in order from the lower side (the side of the PTP main body 11). The metal layer 32 is, for example, an aluminum layer and serves as an antenna wiring layer on which wiring forming an antenna is formed. The antenna wiring may be integrally formed over the entire surface of the metal layer 32 or may be formed in a plurality of divided parts within the plane of the metal layer 32. In the case of divided formation, for example, as shown by the dashed-dotted line in FIG. 8, the plane of the metal layer 32 is divided into a rectangular shape corresponding to the arrangement of the accommodating portions 12, and antenna wiring may be formed for each divided region (for example, 10 divisions in this embodiment).

[0031] The PTP 110 is configured to be capable of wireless communication with an external communication device by the metal layer 32 (antenna wiring layer) and the IC 40. The IC 40 and the antenna in the metal layer 32 are configured to be able to receive a signal transmitted from an external communication device and return a signal to the external communication device in response thereto. As the wireless communication method, a short-range wireless communication technology such as RFID is adopted, but the communication method is not limited.

[0032] As shown in FIG. 8, one second slit 33 having an elongated shape (more specifically, an I-shaped) in plan view is formed for each accommodating portion 12 in the metal layer 32, and a plurality (10 in this embodiment) are formed. As shown in FIGS. 8 and 9, the second slit 33 overlaps with one of the two first slits 37 formed for each accommodating portion 12 in plan view. Each second slit 33 extends in an I-shape from the outer peripheral edge 32A of the metal layer 32 and is formed to penetrate from the metal layer 32 to the upper strong adhesive layer 34A. In this embodiment, each second slit 33 extends in an I-shape to a position overlapping with the half cut 39, but it is sufficient that it overlaps with a part of the first slit 37 in plan view, and it is not necessarily required to extend to the half cut 39.

[0033] As shown in Fig. 8, the base material layer 35 is adhered to the metal layer 32 by the upper strong adhesive layer 34A and supports the metal layer 32. The base material layer 35 can improve the shape stability of the metal layer 32 and the heat resistance against processing during manufacturing. The base material layer 35 is made of a resin material having insulation properties, and the layer thickness is made sufficiently small compared to the resin layer 36 (for example, about 25 μm to 50 μm). Specifically, a PET (polyethylene terephthalate) film can be used as the base material layer 35.

[0034] As shown in Fig. 9, the upper strong adhesive layer 34A is interposed between the metal layer 32 and the base material layer 35 and firmly adheres the two. Also, the lower strong adhesive layer 34B is interposed between the base material layer 35 and the resin layer 36 and firmly adheres the two. The upper strong adhesive layer 34A and the lower strong adhesive layer 34B are made of, for example, an adhesive or an adhesive tape made of an acrylic-based, urethane-based, silicon-based, or rubber-based material. The adhesive force of the upper strong adhesive layer 34A and the lower strong adhesive layer 34B is greater than that of the weak adhesive layer 38. Specifically, the adhesive force (JIS Z 0237 (2000)) of the lower strong adhesive layer 34B to the resin layer 36 is 10 N / 25 mm or more. Thus, when the resin layer 36 is peeled along the first slit 37, the base material layer 35 and the metal layer 32 firmly adhered thereto are also peeled together and are supposed to bend along the half cut 39. Note that a perforated breaking line or the like may be formed at a position overlapping the second slit 33 in a plan view on the base material layer 35 so that it is easily broken during peeling.

[0035] As shown in Fig. 8, the IC40 is a rectangular parallelepiped IC chip, and a plurality (ten in this embodiment) of them are mounted one by one for each second slit 33 (for each housing portion 12). The IC40 is arranged in the metal layer 32 so as to cover a part of the second slit 33. Each IC40 has its terminals connected to wiring that constitutes an antenna formed in the metal layer 32. In this embodiment, the IC40 is arranged so as to cover a portion near one end (the end on the outer peripheral edge 32A side) 33A of the second slit 33, but it may be arranged so as to cover other portions, or may be arranged so as to cover all of it when the extension length of the second slit 33 is small or the like.

[0036] According to the PTP110 having the above-described configuration, in addition to the child resistance function similar to that of the first embodiment, an unsealing detection function can be realized. More specifically, when the resin layer 36 and the metal layer 32 are peeled along the first slit 37, the terminals of the IC40 are peeled from the metal layer 32, and the IC40 and the antenna wiring in the metal layer 32 are disconnected and become non-conductive, and the IC40 cannot communicate with an external communication device. As a result, the external communication device can determine the presence or absence of peeling, and thus the presence or absence of unsealing, based on whether a predetermined signal can be received.

[0037] Also, the resin layer 36 is interposed between the metal layer 32 (antenna wiring layer) and the IC40 mounted thereon, and the lid member 14 (aluminum foil 16) of the PTP main body 110. Thereby, the electromagnetic wave interference generated between the two during communication for unsealing detection can be suppressed by the insulating effect of the resin layer 36. As a result, it is possible to suppress a situation where the communication performance deteriorates and unsealing detection becomes difficult. Therefore, according to the PTP110, an unsealing detection function with excellent communication performance can be realized.

[0038] <Other Embodiments> The present invention is not limited to the embodiments described with the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.

[0039] (1) The shapes of the protective sheets 30A and 130A, and the number and positions of the first slit 37 and the second slit 33 can be appropriately changed according to the shape of the PTP main body 11 to be pasted and the number and positions of the accommodating parts 12. For example, for the PTP main bodies 211 and 311 shown in FIGS. 10 and 11, the protective sheets 230A and 330A as shown in FIGS. 12 and 13 are respectively combined.

[0040] (2) The planar shape of the first slit 37 is not limited to an I shape. For example, it may be a substantially L shape, a substantially J shape, etc., as long as one end 37A reaches the outer peripheral edge 36A of the resin layer 36 and extends in a shape that partially follows the outer peripheral edge of the accommodating part 12 (the opening edge of the opening 12A) from the one end 37A. According to such a shape, after the user peels the protective sheets 30A, 130A, 230A, and 330A along the first slit 37 from the one end 37A side, the lid member 14 covering the opening 12A of the accommodating part 12 can be press-through.

[0041] (3) The planar sizes of the protective sheets 30A, 130A, 230A, and 330A may be formed larger than the PTP main bodies 11, 211, and 311.

[0042] (4) The PTPs 10 and 110 may be configured to be separable individually for each accommodating part 12.

Explanation of Reference Numerals

[0043] 10, 110... PTP (Press-Through Package), 11, 211, 311... PTP main body, 12... Accommodating part, 13... Sheet-like container, 14... Lid member, 30, 30A, 130A, 230A, 330A... Protective sheet, 32... Metal layer, 36... Resin layer, 37... First slit (slit), 38... Weak adhesive layer (first adhesive layer), 39... Half cut (cut), 40... IC, 50... Release paper

Claims

1. A protective sheet to be attached to a press-through package having a sheet-like container having a plurality of accommodating portions and a lid member for sealing the plurality of accommodating portions, which is separable from the press-through package and has a resin layer having a plurality of slits serving as a trigger for separation for each of the accommodating portions, a first adhesive layer adhered to the resin layer and having a surface on the opposite side of the resin layer that can be adhered to the lid member, a metal layer disposed on the opposite side of the resin layer from the first adhesive layer, and an IC mounted at a position overlapping at least a part of the slit in plan view on the metal layer and communicating with an external device. A protective sheet comprising.

2. The plurality of slits are provided in two for each of the accommodating portions so as to face each other with the portion overlapping the accommodating portion of the resin layer in plan view therebetween, The protective sheet according to claim 1, wherein each of the slits is elongated so as to extend from a part of the outer peripheral edge of the resin layer in a direction intersecting the outer peripheral edge.

3. The protective sheet according to claim 2, wherein a cut is provided on the surface of the resin layer on the side of the first adhesive layer so as to connect the extending ends of the slits provided in two.

4. The planar shape of the resin layer is rectangular as a whole, The protective sheet according to claim 2 or 3, wherein each of the slits extends along the short side direction from a part of the long side of the outer peripheral edge.

5. The planar shape of the resin layer is rectangular as a whole, The protective sheet according to claim 2 or 3, wherein each of the slits extends along the long side direction from a part of the short side of the outer peripheral edge.

6. The protective sheet according to any one of claims 1 to 5, wherein the first adhesive layer is an adhesive or an adhesive tape made of an acrylic-based, urethane-based, silicone-based, or rubber-based material.

7. A release paper disposed on the opposite side of the resin layer from the first adhesive layer, the release paper being peeled off from the first adhesive layer to expose the first adhesive layer before being attached to the lid member. The protective sheet according to any one of claims 1 to 6, comprising.

8. A press-through package comprising the protective sheet according to any one of claims 1 to 6.

9. The press-through package according to claim 8, wherein the planar shape and planar size of the protective sheet are substantially the same as those of the sheet-like container and the lid member.

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