Opening detection sheet, package

Abstract

An opening detection sheet (30A) to be attached to a package (10) includes a metal layer (32) configured to be peeled off from the package (10) and having a slit; an IC (40) mounted on the metal layer (32) in a manner to cover at least a part of the slit (33) for communicating with an external device; an insulating layer (36) disposed on the opposite side of the metal layer (32) from the IC (40); and a first adhesive layer (38) adhered to the opposite side of the metal layer (32) from the insulating layer (36) and configured to be adhered to the package (10).

Description

TECHNICAL FIELD

[0001] The present technology relates to an opening detection sheet and a packaging. BACKGROUND

[0002] In the past, in a packaging (for example, a blister pack) that has a housing portion that houses a tablet or the like, a technology for detecting opening of the housing portion is known, and one example is disclosed in Patent Literature 1. The packaging described in Patent Literature 1 has a packaging main body portion that has a housing portion (a housing portion) for housing an object to be housed, a sheet that seals the housing portion, a wire that is formed on the sheet in a manner so as to pass through an opening of the sealed housing portion, and a wireless communication device that is formed on the sheet in a manner so as to be connected to the wire. By the wireless communication device provided for each housing portion emitting different signals depending on whether the housing portion is opened or not, it is possible to improve the reliability of the detection of the removal of the object to be housed, and even if each housing portion is individually cut, it is possible to detect the case where the housing portion is opened.

[0003] PRIOR ART DOCUMENTS

[0004] PATENT LITERATURE

[0005] Patent Literature 1: International Publication No. 2019 / 069772 SUMMARY

[0006] (PROBLEMS TO BE SOLVED BY THE INVENTION)

[0007] However, the packaging described in Patent Literature 1 has a concern that electromagnetic waves from the wire formed on the sheet and the wireless communication device interfere with the metal material contained in the sheet. If electromagnetic wave interference occurs, it is difficult to determine whether the signal emitted from the wireless communication device is different depending on whether the housing portion is opened or not, and the opening detection becomes difficult.

[0008] The present technology was completed based on the actual situation described above, and aims to improve the reliability of opening detection.

[0009] (TECHNICAL SOLUTION FOR SOLVING THE PROBLEMS)

[0010] The technical solution for solving the above-mentioned problems is as follows.

[0011] <1> An opening detection sheet is an opening detection sheet to be attached to a packaging, and has a metal layer provided so as to be peelable from the packaging and having a slit, an IC mounted on the metal layer in a manner so as to cover at least a part of the slit, for communicating with an external device, an insulating layer disposed on the opposite side of the metal layer from the IC, and a first adhesive layer adhered to the opposite side of the insulating layer from the metal layer and provided so as to be adherable to the packaging.

[0012] The opening detection sheet according to any one of <1> to <3> above, wherein the opening detection sheet further has a second adhesive layer disposed between the insulating layer and the metal layer and adhered to the insulating layer, the second adhesive layer having an adhesive strength greater than that of the first adhesive layer.

[0013] The opening detection sheet according to <2> above, wherein the second adhesive layer is an adhesive or an adhesive tape including a material of an acrylic, urethane, silicone, or rubber type.

[0014] The opening detection sheet according to any one of <1> to <3> above, wherein the first adhesive layer is an adhesive or an adhesive tape including a material of an acrylic, urethane, silicone, or rubber type.

[0015] The opening detection sheet according to any one of <1> to <3> above, wherein the first adhesive layer has an adhesive strength of 0.01 N / 25 mm or greater and less than 10 N / 25 mm with respect to the insulating layer.

[0016] The opening detection sheet according to any one of <1> to <5> above, wherein the insulating layer has a layer thickness of 1 mm or greater and 2 mm or less.

[0017] The opening detection sheet according to any one of <1> to <6> above, wherein the opening detection sheet further has a release paper disposed on the opposite side of the first adhesive layer from the insulating layer, the release paper being peeled from the first adhesive layer to expose the first adhesive layer before being attached to the packaging member.

[0018] A packaging member having: a housing portion that houses an object to be housed; a cover member of a sheet shape that seals the housing portion; and the opening detection sheet according to any one of <1> to <6> above attached to the cover member.

[0019] The packaging member according to <8> above, wherein the cover member has an aluminum foil.

[0020] The packaging member according to any one of <8> to <9> above, wherein the housing portion is provided in plurality, and the slit and the IC are provided per housing portion.

[0021] The packaging member according to any one of <8> to <10> above, wherein the object to be housed is capable of being taken out by breaking the cover member by pressure.

[0022] (EFFECT OF INVENTION)

[0023] According to the present technology, it is possible to improve the reliability of opening detection. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a sectional view of the opening detection sheet material relating to Embodiment 1.

[0025] Figure 2 is a plan view of a PTP to which the opening detection sheet material is attached.

[0026] Figure 3 is a sectional view of the A-A line of Figure 2

[0027] Figure 4 is a sectional view of the B-B line of Figure 2

[0028] Figure 5 is a sectional view of the vicinity of the IC of Figure 3

[0029] Figure 6 is a perspective view of the PTP showing a state in which the metal layer is peeled off.

[0030] Figure 7 is a sectional view of the PTP showing a state in which the metal layer is peeled off.

[0031] Figure 8 is Evaluation Test Result 1.

[0032] Figure 9 is a plan view showing the outer shape of the opening detection sheet material relating to Embodiment 2.

[0033] Figure 10 is a plan view showing the outer shape of the opening detection sheet material relating to Embodiment 3.

[0034] Figure 11 is Evaluation Test Result 2. DETAILED DESCRIPTION

[0035] <Embodiment 1>

[0036] Reference will be made to Figures 1 to 8 Embodiment 1 is described. In the present embodiment, an opening detection sheet material 30A and a blister pack (PTP, an example of a packaging member) 10 to which the protective sheet material 30A is attached are exemplified. Note that in a part of each drawing other than Evaluation Test Results, an X-axis, a Y-axis, and a Z-axis are shown, and each axis direction is depicted in a manner common to each drawing.

[0037] As Figure 1 ​​​As shown, the opening detection sheet 30 is provided with: a composite material 31 in which various layers are laminated; an IC (Integrated Circuit) 40 mounted on the composite material 31; and a release paper 50 attached to the opposite side of the composite material 31 from the IC 40. The release paper 50 is attached to a weakly adhered layer 38 (an example of a first adhered layer) that forms the lower surface (the surface opposite the IC 40) of the composite material 31 in a releasable manner. By peeling the release paper 50 from the weakly adhered layer 38, the weakly adhered layer 38 is exposed, and the exposed weakly adhered layer 38 is peeled off as Figure 3 and Figure 4 As shown, the release paper 50 is attached to the PTP 10 (more specifically, the cover material 14 of the PTP main body portion 11 described later). In the present specification, the opening detection sheet in a state in which the release paper 50 is peeled is denoted by the symbol 30A, and the opening detection sheet in a state in which the release paper 50 is not peeled is denoted by the symbol 30. The opening detection sheet 30 is able to be stored and circulated as a single body (a separate body) before being attached to the PTP main body portion 11 by the release paper 50. Details of the weakly adhered layer 38 are described later.

[0038] As shown in Figure 3 and Figure 4 The PTP 10 is provided with: a PTP main body portion 11 that houses an object T (a medicine such as a tablet, or the like); and an opening detection sheet 30A that is attached to the PTP main body portion 11. The PTP main body portion 11 is provided with: a sheet-shaped container 13 that is provided with a housing portion 12 that houses the object T; and a cover material 14 that is attached so as to seal the housing portion 12 in a manner so as to cover an opening 12A of the housing portion 12. The planar shape of the PTP main body portion 11 is overall rectangular (oblong), and the opening detection sheet 30A also has a planar shape that is similar thereto. In addition, the planar size of the opening detection sheet 30A is such that it is able to cover the entirety of the PTP main body portion 11, and in the present embodiment, the planar sizes of the two are substantially the same.

[0039] As shown in Figure 4 A plurality of housing portions 12 that are recessed (protrude in a substantially hemispherical shape) toward the opposite side of the cover material 14 are formed in the sheet-shaped container 13. As shown in Figure 2 The planar shape of each of the housing portions 12 is circular, which is similar to the shape of the object T. In the present embodiment, for example, five housing portions 12 are each formed at a prescribed interval in the X-axis direction (the long direction), and two housing portions 12 are each formed at a prescribed interval in the Y-axis direction (the short direction), for a total of ten housing portions 12. The cover material 14 is a flat sheet-shaped member that is composed of a thin raw material that can be pierced. The cover material 14 is attached to the sheet-shaped container 13 except for the portion that covers the opening 12A. The material of the sheet-shaped container 13 and the cover material 14 is appropriately a known material for a PTP, and for example, the sheet-shaped container 13 is made of a resin material, and the cover material 14 is made of an aluminum foil.

[0040] As shown in Figure 5 , the composite material 31 is formed in a structure in which the metal layer 32, the upper-side strong adhesive layer 34A, the base material layer 35, the lower-side strong adhesive layer 34B (an example of a second adhesive layer), the insulating layer 36, and the weak adhesive layer 38 are sequentially stacked from the upper side (the IC 40 side). The metal layer 32 is, for example, an aluminum layer, and is an antenna wiring layer in which a wiring constituting an antenna is formed. The antenna wiring can be integrally formed in the entire surface of the metal layer 32, or can be formed in a plurality of pieces by being divided in the surface of the metal layer 32. In the case of being divided, as shown by the single-dot chain line in Figure 2 , the surface of the metal layer 32 can be divided into a rectangular shape in a form corresponding to the arrangement of the housing portions 12, and the antenna wiring can be formed in each of the divided regions (for example, 10 divisions in the present embodiment). Alternatively, for example, the surface of the metal layer 32 can be divided for every two housing portions 12 arranged in the short side direction, and the antenna wiring can be formed in each of the divided regions (for example, 5 divisions in the present embodiment).

[0041] The PTP 10 is configured to enable wireless communication with an external communication device through 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, for example, receive a signal transmitted from the external communication device, and return a signal to the external communication device in the form of responding to the signal. As the wireless communication method, a near field wireless communication technology such as RFID can be employed, but the communication method is not limited.

[0042] As shown in Figure 2 , in the metal layer 32 and the upper-side strong adhesive layer 34A, one of the slits 33 each having a substantially J-shaped planar view is formed for each of the housing portions 12, and a plurality of (10 in the present embodiment) such slits 33 are formed. Each of the slits 33 extends in a substantially J shape in a manner of partially surrounding the outer periphery of the housing portion 12 (the opening edge of the opening 12A). As shown in Figure 4 , each of the slits 33 is a cut extending through the metal layer 32 and the upper-side strong adhesive layer 34A, and one end portion 33A of the substantially J-shaped extension reaches the outer peripheral edge 32A of the metal layer 32. As a result, as shown in Figure 6 , a user can peel the metal layer 32 (and the insulating layer 36 adhered thereto) from the one end portion 33A side along the shape of the slit 33, using the one end portion 33A as a starting point for peeling. Note that the planar shape of the slit 33 is not limited to the substantially J shape, but can be, for example, a substantially L shape, a substantially I shape, or the like, as long as it extends from the one end portion 33A in a manner of partially following the outer periphery of the housing portion 12. According to such a shape, after the user peels the metal layer 32 and the insulating layer 36 from the one end portion 33A side along the slit 33, the cover material 14 covering the opening 12A of the housing portion 12 can be pressed.

[0043] AsFigure 5 As shown, 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. By the base material layer 35, the shape stability of the metal layer 32 and the heat resistance to processing at the time of manufacture can be improved. The base material layer 35 is composed of a resin material having insulating properties, and the layer thickness is sufficiently small (for example, about 25 to 50 μm) compared to the insulating layer 36. As the base material layer 35, specifically, a PET (polyethylene terephthalate) film can be used.

[0044] As shown, Figure 5 The upper strong adhesive layer 34A is interposed between the metal layer 32 and the base material layer 35 to firmly adhere the two. In addition, the lower strong adhesive layer 34B is interposed between the base material layer 35 and the insulating layer 36 to firmly adhere the two. The upper adhesive layer 34A and the lower adhesive layer 34B are adhesives or adhesive tapes including materials of acrylic, urethane, silicon, or rubber. The adhesive force of the upper strong adhesive layer 34A and the lower adhesive layer 34B is greater than that of the weak adhesive layer 38, and specifically, the adhesive force (JIS Z 0237 (2000)) with respect to the insulating layer 36 is set to 10 N / 25 mm or more. Thus, when the metal layer 32 is peeled, the base material layer 35 and the insulating layer 36 firmly adhered thereto can also be peeled along with the slit 33. Note that, in the base material layer 35 and the insulating layer 36, a perforated breaking line, a slit, or the like can be formed at a position overlapping the slit 33 in plan view, so as to be easily broken at the time of peeling.

[0045] As shown, Figure 5 The weak adhesive layer 38 can releasably adhere the insulating layer 36 to the cover material 14 of the PTP main body portion 11. The opening detection sheet material 30A is attached to the PTP main body portion 11 by adhering the weak adhesive layer 38 to the sheet surface of the cover material 14. In addition, as shown, Figure 1 The weak adhesive layer 38 can releasably adhere the insulating layer 36 to the release paper 50 before the opening detection sheet material 30A is attached to the PTP main body portion 11. The weak adhesive layer 38 is an adhesive or an adhesive tape including materials of acrylic, urethane, silicon, or rubber. The adhesive force of the weak adhesive layer 38 is smaller than that of the upper strong adhesive layer 34A and the lower adhesive layer 34B, and specifically, the adhesive force (JIS Z 0237 (2000)) with respect to the insulating layer 36 is set to 0.01 N / 25 mm or more and less than 10 N / 25 mm.

[0046] As shown, Figure 5As shown, the insulating layer 36 is arranged on the opposite side of the metal layer 32 from the IC 40 and is adhered to the base material layer 35 by the lower strong adhesive layer 34B. The insulating layer 36 is interposed between the metal layer 32 (antenna wiring layer) and the IC 40 mounted thereon and the cover material 14 (aluminum foil) of the PTP main body portion 11, and functions to suppress electromagnetic wave interference generated between the two. The insulating layer 36 can be appropriately formed using a known resin sheet, but in order to increase the communication distance, it is preferable to contain a material having a small relative dielectric constant ε, and the layer thickness is preferably a predetermined thickness or more.

[0047] Here, the relationship between the relative dielectric constant ε and the layer thickness d of the insulating layer 36 and the communication distance of the PTP 10 will be described. The impedance Z of the PTP 10 10 is larger, the communication distance of the PTP 10 is larger, and the impedance Z 10 is larger. The electrostatic capacitance C of the PTP 10 is represented by the following equation using the electrostatic capacitance C and the frequency f of wireless communication.

[0048] Z 10 = 1 / (2πf x C) (Equation 1)

[0049] The electrostatic capacitance C of the PTP 10 can be approximated as the capacitance of the flat plate conductors (metal layer 32 and cover material 14) facing each other through the insulating layer 36, and is represented by the following equation.

[0050] C = S x ε x ε0 / d (Equation 2)

[0051] S: Area of the opening detection sheet 30A

[0052] ε: Relative dielectric constant of the insulating layer 36

[0053] ε0: Vacuum dielectric constant

[0054] d: Layer thickness of the insulating layer 36.

[0055] In the case of communication by the same frequency f, according to (Equation 1) and (Equation 2), the smaller the relative dielectric constant ε of the insulating layer 36, the larger the impedance Z 10 of the PTP 10, and the larger the layer thickness d, the larger the impedance Z 10The larger the relative permittivity ε of the insulating layer 36, the greater the communication distance of PTP10; conversely, the greater the layer thickness d, the greater the communication distance of PTP10. For example, if a foamed PET (polyethylene terephthalate) sheet with a foaming ratio of twice is used as the insulating layer 36, the relative permittivity ε can be reduced to approximately 1.58. Other resin sheets with a relative permittivity ε of approximately 1.58 or less, such as polystyrene, polyurethane, polypropylene, and polyimide, can also be used as the insulating layer 36. As explained in the evaluation test results 1 described later, from the viewpoint of communication distance, the layer thickness d of the insulating layer 36 is preferably 1 mm or more. However, if the insulating layer 36 becomes too thick, it will become difficult for the user to peel off the metal layer 32 and the insulating layer 36 along the slit 33. Considering both communication distance and peelability, the layer thickness d of the insulating layer 36 is preferably 1 mm or more and 2 mm or less.

[0056] like Figure 2 As shown, IC40 is a cuboid IC chip, with one chip mounted for each slit 33 (each receiving portion 12), and multiple IC40s are mounted (10 in this embodiment). IC40s are arranged on the metal layer 32 such that they cover a portion near one end 33A of the slit 33. Figure 5 As shown, the terminals 41 of each IC 40 are connected to the wiring that forms the antenna formed on the metal layer 32. One terminal (the + terminal to which a positive electrode is applied) 41A and another terminal (the - terminal to which a negative electrode is applied) 41B are opposite each other across the slit 33.

[0057] like Figure 7 As shown, when the metal layer 32 and the insulating layer 36 are peeled off along the slit 33, the portion of the metal layer 32 containing the + terminal 41A separates from the PTP10 side, and the - terminal 41B is pulled away from the metal layer 32. As a result, the antenna wiring within the metal layer 32 is disconnected, rendering the IC 40 non-conductive, and the IC 40 unable to communicate with external communication devices. In the external communication device, the response (communication) signal from the IC 40 to its transmitted signal is interrupted.

[0058] When the metal layer 32 and the insulating layer 36 are peeled off, the receiving portion 12 covered by the peeled metal layer 32 and the insulating layer 36 can be opened. More specifically, after the metal layer 32 and the insulating layer 36 are peeled off, when the user presses the contained item T in the receiving portion 12 toward the cover 14 and breaks the cover 14, the PTP body portion 11 is opened. Therefore, the PTP 10 is a peel-and-press type package in which the metal layer 32 and the insulating layer 36 are peeled off first, and then the cover 14 is broken, thereby opening the PTP body portion 11.

[0059] According to the above-described structure, the external communication device can determine that the housing portion 12 in which the IC 40 is disposed is unopened in a case where a reply signal to the transmission signal from the IC 40 can be received. On the other hand, in a case where the reply signal is interrupted and cannot be received, it can be determined that the housing portion 12 is opened. The external communication device is a mechanism that determines whether or not the opening has occurred on the basis of whether or not a given signal is received before and after the opening, rather than a mechanism that determines whether or not the opening has occurred on the basis of different signals received before and after the opening. Therefore, even in a case where the S / N ratio of the signal (electromagnetic wave) transmitted by the antenna inside the IC 40 and the metal layer 32 is reduced due to, for example, electromagnetic wave interference, it is easy to determine whether or not the opening has occurred. In addition, the opening detection sheet 30A can suppress electromagnetic wave interference generated between the cover material 14 (aluminum foil) of the PTP main body portion 11 by the insulating layer 36. In this way, the PTP 10 is configured to suppress electromagnetic wave interference with the PTP main body portion 11 by the insulating layer 36, and is configured to easily determine whether or not the opening has occurred even in a case where the S / N ratio is reduced due to electromagnetic wave interference, and thus can improve the reliability of the opening detection.

[0060] <evaluation experiment 1>

[0061] In order to evaluate the communication performance of the above-described PTP 10, evaluation experiment 1 was performed. In evaluation experiment 1, the communication distance was evaluated for evaluation samples (Examples 1 to 6) that imitated the simple structure of the PTP 10.

[0062] <conditions>

[0063] • Planar size of the opening detection sheet 30A: 35 mm x 92 mm

[0064] • Metal layer 32: Copper foil or aluminum foil

[0065] • Upper and lower strong adhesive layers 34A and 34B: Acrylic adhesive

[0066] • Insulating layer 36: Foamed PET sheet (relative dielectric constant ε = about 1.58)

[0067] • Layer thickness d of the insulating layer 36: 1 mm or 2 mm

[0068] • PTP main body portion 11 and weak adhesive layer 38: Aluminum seal

[0069] • IC 40: IC for RFID

[0070] • Number of mounted ICs 40: 10 in Examples 1 to 4 as shown in Figure 2 Figure 2 ​The four ICs 40A (position 1), 40B (position 2), 40C (position 9), and 40D (position 10) are mounted in correspondence with the housing portions 12 of the two left and right end portions in the long direction of the long side.

[0071] • Measuring device: RFID tester (Tagformance lite manufactured by Voyantic)

[0072] • Measuring environment: Communication was performed at a distance of 45 cm from the measuring antenna in an anechoic chamber (lower limit of measuring distance = 0.45 m)

[0073] • Measuring content: The EPC code was specified as the identification code, and measurement was performed by the command Query

[0074] • Conversion method of communication distance: The communication distance was converted to the case where the EIRP (Equivalent Isotropically Radiated Power) was 3.28 W output based on the minimum output with a response (reply).

[0075] • Evaluation method of communication distance

[0076] The evaluation samples in which the antenna wiring formed in the metal layer 32 was divided in the plane to form a plurality of (Examples 1 to 2 and 5) and the evaluation sample in which the antenna wiring was formed integrally in the entire plane (Examples 3 to 4 and 6) were evaluated. The number of divisions of Example 5 was 10 divisions in correspondence with the number of housing portions 12 (10), and the number of divisions of Examples 1 and 2 was 5 divisions in a manner of dividing the number of housing portions 12 (10) by 2 (2 in each of the two Figure 2 The communication distance with the ICs 40A (position 1), 40B (position 2), 40C (position 9), and 40D (position 10) was evaluated for each example. The evaluation of the communication distance was a four-level evaluation from A to D, and the case where the range of the communication distance was 5 m or more was set to A (very good), the case where it was 1 m or more and less than 5 m was set to B (good), the case where it was 0.45 m or more and less than 1 m was set to C (possible), and the case where it was less than 0.45 m was set to D (not possible).

[0077] • Evaluation result of communication distance

[0078] The experimental results of Evaluation Experiment 1 will be described. As shown in FIG. 6, the communication distance with the IC 40A (position 1) was 5 m or more in all of the evaluation samples, and the communication distance was the best. Figure 6As shown, it was confirmed that the communication distance, although it has a variation depending on the position where the IC 40 is installed (IC 40A (position 1), IC 40B (position 2), IC 40C (position 9), IC 40D (position 10)), was C evaluation or more in the examples of Embodiments 1 to 6. In Embodiment 1, which was the lowest in the evaluation, the communication distance at positions 1 and 2 was also 0.8 m, and it was confirmed that it was suitable for use. In addition, by comparing Embodiments 1 and 2, and Embodiments 3 and 4, respectively, it was confirmed that the communication distance was greater in the examples in which the film thickness of the insulating layer 36 was 2 mm (Embodiments 2 and 4) than in the examples in which it was 1 mm (Embodiments 1 and 3). This is consistent with the mechanism explained using (Formula 1) and (Formula 2) described above. Therefore, if the case in which the film thickness of the insulating layer 36 was less than 1 mm in Embodiment 1 is taken as Comparative Example 1, it can be inferred that the communication distance at positions 1 and 2 in Comparative Example 1 was less than 0.8 m, and became D evaluation. Therefore, from the viewpoint of communication performance, the film thickness of the insulating layer 36 is preferably 1 mm or more.

[0079] In addition, by comparing Embodiments 1 and 3, Embodiments 2 and 4, and Embodiments 5 and 6, respectively, it was confirmed that the communication distance was greater in the examples in which the antenna wiring was of the integrated type (Embodiments 3, 4, and 6) than in the examples in which it was of the split type (Embodiments 1, 2, and 5). The examples of the integrated type can be considered to have a greater communication distance because the size of the antenna wiring is large. On the other hand, it was known that in the examples of the integrated type, when the metal layer 32 is peeled along the slit 33 at any one of positions 1, 2, 9, and 10, and any one of the ICs 40A, 40B, 40C, and 40D disposed at that position is detached, the influence easily spreads to other positions as well. In addition, it was known that in the examples of the integrated type, the influence between adjacent positions (for example, positions 1 and 2, and positions 9 and 10) is large, and frequency adjustment is difficult. Therefore, it was confirmed that the examples of the split type were more excellent in terms of communication stability.

[0080] <Embodiments 2 and 3>

[0081] Reference Figures 9 to 11 The PTP 110 according to Embodiment 2 and the PTP 210 according to Embodiment 3 will be described. As shown in Figs. 1 and 2, respectively, the PTP 110 and 210 each include a PTP body portion 11 and a seal detection sheet 130A and 230A, respectively, which are attached to the PTP body portion 11. Figure 9 and Figure 10 As shown in Figs. 1 and 2, respectively, the planar size of the seal detection sheet 130A and 230A of the PTP 110 and 210, respectively, is larger than that of the PTP body portion 11, which is different from Embodiment 1. In Embodiments 2 and 3, the description of the same structure, action, and effects as in Embodiment 1 is omitted. In addition, in Figs. 1 and 2, the illustration of the members (the slit 33, the IC 40, and the like) that constitute the seal detection sheet 130A and 230A is omitted in order to clearly show the outer shape of the seal detection sheet 130A and 230A with respect to the PTP body portion 11, but the basic configuration is the same as in Embodiment 1. Figure 9 and Figure 10 In Figs. 1 and 2, the illustration of the members (the slit 33, the IC 40, and the like) that constitute the seal detection sheet 130A and 230A is omitted in order to clearly show the outer shape of the seal detection sheet 130A and 230A with respect to the PTP body portion 11, but the basic configuration is the same as in Embodiment 1.

[0082] As Figure 9 shown, the planar size of the opening detection sheet 130A of Embodiment 2 is 35 x 102 mm, and the size in the long direction is 10 mm larger than the PTP main body 11. The opening detection sheet 130A is obtained by extending the right end portion in the long direction of the opening detection sheet 30A of Embodiment 1 by 10 mm in the long direction (+Y axis direction). That is, each layer constituting the opening detection sheet 130A is formed to have an outer shape size in the long direction that is 10 mm larger than that of Embodiment 1. The other structures of the opening detection sheet 130A (for example, the number and interval of the slits 33) are the same as those of Embodiment 1.

[0083] As Figure 10 shown, the planar size of the opening detection sheet 230A of Embodiment 3 is 45 x 90 mm, and the size in the short direction is 10 mm larger than the PTP main body 11. The opening detection sheet 230A is obtained by extending each of the upper and lower end portions in the short direction of the opening detection sheet 30A of Embodiment 1 by 5 mm in the short direction (+X axis direction, -X axis direction). That is, each layer constituting the opening detection sheet 230A is formed to have an outer shape size in the short direction that is 10 mm larger than that of Embodiment 1. The other structures of the opening detection sheet 230A (for example, the number and interval of the slits 33) are the same as those of Embodiment 1.

[0084] By increasing the planar size of the opening detection sheet 130A, 230A, as shown in the evaluation test result 2 described later, it is possible to increase the communication distance. This can be considered to be due to the effect that the area S (at least the area of the metal layer 32) becomes large, and the effect that the size of the antenna wiring in the metal layer 32 can be easily made large, in the mechanism described using (Formula 1) and (Formula 2) described above.

[0085] <Evaluation Test 2>

[0086] In order to evaluate the communication performance of the PTP 110, 210 as described above, Evaluation Test 2 was performed. In Evaluation Test 2, the communication distance was evaluated for an evaluation sample (Examples 7 to 10) that simulated a simple structure of the PTP 110, 210.

[0087] <Conditions>

[0088] • Planar size of the opening detection sheet 130A: 35 mm x 102 mm

[0089] • Planar size of the opening detection sheet 230A: 45 mm x 92 mm

[0090] • Metal layer 32: the same as Evaluation Test 1 except for the planar size

[0091] • Upper and lower strong adhesive layers 34A and 34B: Same as Evaluation Experiment 1 except for planar dimensions

[0092] • Insulating layer 36: Same as Evaluation Experiment 1 except for planar dimensions

[0093] • Layer thickness d of insulating layer 36: 2 mm

[0094] • PTP main body portion 11 and weak adhesive layer 38: Same as Evaluation Experiment 1

[0095] • IC 40: Same as Evaluation Experiment 1

[0096] • Number of mounted ICs 40: Four ICs 40A (position 1), 40B (position 2), 40C (position 9), and 40D (position 10) were mounted in a manner corresponding to the housing portions 12 at both left and right end portions in the long side direction of the PTP main body portion 11 Figure 2

[0097] • Measuring equipment: Same as Evaluation Experiment 1

[0098] • Measuring environment: Same as Evaluation Experiment 1

[0099] • Measuring content: Same as Evaluation Experiment 1

[0100] • Conversion method of communication distance: Same as Evaluation Experiment 1

[0101] <Method of evaluating communication distance>

[0102] Evaluation was performed on evaluation samples in which the antenna wiring formed on the metal layer 32 was divided into a plurality of pieces in the plane (Examples 7 and 9) and on evaluation samples in which the antenna wiring was formed integrally in the entire plane (Examples 8 and 10). The number of divisions of Examples 7 and 9 was performed in a manner corresponding to the number of housing portions 12 (10) and was divided into 10 pieces. For each example, as with Evaluation Experiment 1, the communication distance with the IC 40A (position 1), 40B (position 2), 40C (position 9), and 40D (position 10) was evaluated. The evaluation of the communication distance was performed as a four-level evaluation from A to D as with Evaluation Experiment 1.

[0103] <Results of evaluation of communication distance>

[0104] The results of the experiment of Evaluation Experiment 2 will be explained. As with Evaluation Experiment 1, the communication distance was evaluated for each of the evaluation samples. Figure 11 ​As shown, the communication distance varies depending on the position (position 1, position 2, position 9, position 10) at which the IC 40 is disposed, but in the examples of Embodiments 7 to 10, each of which is evaluated as B or better, it is confirmed that they are sufficiently suitable for use. In addition, comparing Embodiments 7 and 8, and Embodiments 9 and 10, respectively, as with Evaluation Test Result 1, it is confirmed that the communication distance of the integrated type (Embodiments 8, 10) is greater than that of the split type (Embodiments 7, 9). The integrated type is considered to have a greater communication distance because the size of the antenna wiring is greater. On the other hand, it is known that in the integrated type, when the metal layer 132, 232 is peeled along the slit 33 at any one of the positions 1, 2, 9, 10, and any one of the ICs 40A, B, C, D disposed at that position is detached, the influence easily spreads to other positions as well. In addition, it is known that in the integrated type, the influence between positions close to each other (for example, positions 1 and 2, and positions 9 and 10) is great, and frequency adjustment is difficult. Therefore, as with Evaluation Test Result 1, it is confirmed that the split type is more excellent in terms of communication stability.

[0105] In addition, comparing Embodiments 7 and 9 with Embodiment 5 in Evaluation Test Result 1, it is confirmed that in Embodiment 2 (Embodiment 7) and Embodiment 3 (Embodiment 9), the communication distance is greater than that of Embodiment 5. Furthermore, comparing Embodiments 8 and 10 with Embodiment 6 in Evaluation Test Result 1, it is confirmed that the communication distance of Embodiment 2 (Embodiment 8) and Embodiment 3 (Embodiment 10) is greater than that of Embodiment 6. Thus, it is confirmed that by increasing the planar size of the opening detection sheet 130A, 230A, it is possible to increase the communication distance.

[0106] <Other Embodiments>

[0107] The present application is not limited to the embodiments described above and illustrated in the drawings, and for example, the following embodiments are also included in the technical scope of the present application.

[0108] (1) The opening detection sheet 130A, 230A can not have a planar size of each layer that is greater than that of the PTP main body portion 11. It is considered that when at least the planar size of the metal layer 32 is greater than that of the PTP main body portion 11, it is possible to obtain an effect of being able to increase the communication distance confirmed by Evaluation Test Result 2.

[0109] (2) The shape of the PTP 10, PTP 110, PTP 210, the number of the housing portions 12, the interval, and the like in the drawings are examples, and can be appropriately changed. In addition, it can be configured to be able to be individually cut off for each housing portion 12.

[0110] (Symbol Explanation)

[0111] 10, 110, 210: PTP (package); 11: PTP main body portion; 12: housing portion; 14: lid material; 30, 30A, 130A, 230A: opening detection sheet; 32: metal layer; 33: slit; 34B: lower strong adhesive layer (second adhesive layer); 36: insulating layer; 38: weak adhesive layer (first adhesive layer); 40, 40A, 40B, 40C, 40D: IC; 50: release paper.

Claims

1. A packaging component comprising: Multiple containment units, each containing the contained items; A sheet-like cover material that seals the receiving portion; and The inspection sheet is opened and then adhered to the cover material. The opening and testing sheet has the following features: A metal layer, configured to be peelable from the package, and having a slit; An IC, which is mounted on the metal layer in such a way that it covers at least a portion of the slit, is used for communication with external devices; An insulating layer is disposed on the opposite side of the IC relative to the metal layer; as well as A first adhesive layer, which is bonded to the side opposite to the metal layer relative to the insulating layer, is configured to adhere to the package. The slits and ICs of the opening test sheet are provided in each of the receiving portions. After the metal layer and the insulating layer of the opening test sheet are peeled off along the slits, the object contained in the receiving portion covered by the peeled metal layer and the insulating layer is pressed against the cover material side to break the cover material, thereby allowing the object to be removed.

2. The packaging according to claim 1, wherein, Each of the slits has a planar shape that extends along at least a portion of the outer periphery of the corresponding receiving portion.

3. The packaging according to claim 1, wherein, The opening test sheet also includes a second adhesive layer disposed between the insulating layer and the metal layer and bonded to the insulating layer, wherein the adhesive force of the second adhesive layer is greater than that of the first adhesive layer.

4. The packaging according to claim 3, wherein, The second adhesive layer is an adhesive or adhesive tape containing acrylic, urethane, silicone or rubber materials.

5. The packaging according to claim 2, wherein, The opening test sheet also includes a second adhesive layer disposed between the insulating layer and the metal layer and bonded to the insulating layer, wherein the adhesive force of the second adhesive layer is greater than that of the first adhesive layer.

6. The packaging according to claim 5, wherein, The second adhesive layer is an adhesive or adhesive tape containing acrylic, urethane, silicone or rubber materials.

7. The packaging according to any one of claims 1 to 6, wherein, The first adhesive layer is an adhesive or adhesive tape containing acrylic, urethane, silicone or rubber materials.

8. The packaging according to any one of claims 1 to 6, wherein, The adhesive force of the first adhesive layer relative to the insulating layer is greater than 0.01 N / 25 mm and less than 10 N / 25 mm.

9. The packaging according to any one of claims 1 to 6, wherein, The thickness of the insulating layer is more than 1 mm and less than 2 mm.

10. The packaging according to any one of claims 1 to 6, wherein, The cover material has aluminum foil.

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