JP7616936B2 - Press-Through Package - Google Patents

Description

The present invention relates to press-through packaging.

Press-through packages (hereinafter sometimes referred to as PTPs) are used as packaging containers for medicines such as tablets and capsules. A PTP comprises a sheet-like resin container with a storage section in which medicines and other contents are stored, and a lid attached to the resin container in a manner that covers the opening of the storage section. Such PTPs are opened when the contents stored in the storage section are pushed into the lid by applying force through the storage section, breaking the lid that covers the opening of the storage section (press-through). Recently, PTPs with child resistance (CR) features that make it difficult for children to open them have been proposed.

For example, Patent Document 1 discloses a PTP (PTP packaging body) that includes a container sheet and a sheet-like lid material (lid material sheet) laminated to the container sheet. In this PTP, the lid material used includes a press-through base material (aluminum foil) and a reinforcing layer (cover film, protective layer) that is laminated in a peelable state to the base material. When the reinforcing layer is laminated to the base material, the reinforcing effect of the reinforcing layer prevents the lid material from being pushed through. When the contents contained in the container sheet are to be removed upon opening, the reinforcing layer is peeled off from the base material side, and the base material remaining on the container sheet side is pushed through.

In addition, in the above PTP, a "grip" is provided at the end of the lid material to make it easier to peel off the reinforcing layer. Specifically, a non-adhesive treated area is formed between the base material (aluminum foil) at the end of the lid material and the reinforcing layer (cover film) in the overlapping portion, and this portion of the reinforcing layer serves as a "grip" that makes it easier to grip when peeling off.

JP 2005-82179 A

In some cases, the lid material for a PTP is required to have a base material and a reinforcing layer that are entirely bonded together. Although such lid materials are highly effective in preventing children from accidentally peeling the reinforcing layer off the base material, there are cases where the user has difficulty peeling the reinforcing layer off the base material when opening the container because there is no non-bonded area on the edge of the lid material.

The present invention aims to provide a press-through package having a lid material with a structure that allows the peelable lid portion, including the reinforcing layer, to be easily peeled off from the remaining lid portion when opened.

The means for solving the above problems are as follows.
<1> A press-through package comprising: a resin container having a sheet-like main body portion including a front and a back surface, and a container-like storage portion that bulges outward from the front surface and opens to the back surface side for storing an item to be stored; and a sheet-like lid material adhered to the resin container so as to cover the storage portion from the back surface side and overlap the main body portion, the lid material having a remaining lid portion including a base layer made of a metal foil through which the item to be stored can be pressed through, and a heat-sealable adhesive layer disposed between the base layer and the resin container and adhered to the main body portion, and a peel-off lid portion including a reinforcing layer that reinforces the remaining lid portion, and a release layer disposed between the reinforcing layer and the base layer and adhered in a peelable manner to the base layer, the resin container having a slit portion formed on the front surface side of the main body portion, and the reinforcing layer including a resin reinforcing layer made of a resin film.

<2> The press-through package described in <1>, in which the reinforcing layer is made of metal foil and includes a metal reinforcing layer disposed at a position farther from the remaining lid portion than the resin reinforcing layer.

<3> The press-through package according to <1> or <2>, wherein the slit portion is disposed on the front side of the main body portion between the storage portion and the end of the main body portion, and comprises a portion from the slit portion to the end of the main body portion, and comprises a gripping portion comprising a tear-off portion detachable from the slit portion and an overlapping portion of the lid material that overlaps with the tear-off portion in the thickness direction.

<4> The press-through package according to any one of <1> to <3>, wherein the lid material has a stop portion consisting of a cut portion that cuts at least the peel-off lid portion in the thickness direction, and the stop portion is arranged so as to overlap the main body portion in a plan view and to dispose the storage portion between the stop portion and the slit portion.

<5> The press-through package according to any one of <1> to <4>, wherein the lid material is disposed at least either between the release layer and the base layer or between the release layer and the resin reinforcement layer, and includes a post-peeling exposed print layer that is visible when the peelable lid portion is peeled off from the remaining lid portion.

<6> The press-through package according to any one of <1> to <5>, wherein the remaining lid portion is disposed between the base material layer and the resin container and has a first printed layer visible from the resin container side, and the peel-off lid portion is disposed on the surface of the reinforcing layer opposite the release layer and has a second printed layer visible from the side opposite the resin container side.

The present invention provides a press-through package having a lid material with a structure that allows the peelable lid portion, including the reinforcing layer, to be easily peeled off from the remaining lid portion when opened.

FIG. 1 is a cross-sectional view showing a schematic configuration of a press-through package according to a first embodiment; 1 is a cross-sectional view showing a schematic diagram of an opening operation of the press-through package according to the first embodiment; FIG. 1 is a cross-sectional view showing a schematic configuration of a press-through package according to a first comparative example. FIG. 13 is a cross-sectional view showing a schematic configuration of a press-through package according to Comparative Example 2. FIG. 11 is a cross-sectional view showing a schematic configuration of a press-through package according to another embodiment.

<Embodiment 1>
A press-through package (PTP) 1 according to a first embodiment of the present invention will be described with reference to Figs. 1 and 2. In the PTP 1 shown in Figs. 1 and 2, the upper side (resin container 2 side) is the front side, and the lower side (lid material 3 side) is the back side. Fig. 1 is a cross-sectional view showing a schematic configuration of the PTP 1 according to the first embodiment. The PTP 1 is a packaging container with a child-resistant function that contains an object T (medicinal drug such as a tablet or capsule). The PTP 1 includes a resin container 2 and a lid material 3.

The resin container 2 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. Specifically, the resin container 2 comprises a sheet-like main body 22 including a front surface 22a and a back surface 22b, a container-like storage section 21 that bulges outward (upward) from the front surface 22a and opens to the back surface 22b side, and stores the object T, and a slit section 23. Typically, multiple storage sections 21 are provided in the resin container 2. For ease of explanation, one storage section 21 is shown in FIG. 1.

The storage section 21 is a container-like (recessed) section that opens downward (toward the back surface 22b) and has a space S for storing the stored section T inside. The storage section 21 has an opening 21A at the boundary with the main body section 22. When viewed in a plan view, the storage section 21 has a shape that follows the shape of the stored section T. The resin container 2 is made of, for example, a thermoplastic resin sheet material with a thickness of about 60 μm to 400 μm that is processed into a predetermined shape.

The lid material 3 is a sheet-like member that is adhered to the resin container 2 so as to overlap the main body portion 22 while covering the storage portion 21 from the back surface 22b side. As shown in FIG. 1, the opening 21A provided in the storage portion 21 is covered by the lid material 3 adhered to the resin container 2. Such a lid material 3 includes a remaining lid portion 4 that is adhered to the resin container 2, and a peelable lid portion 5 that is adhered to the remaining lid portion 4 in a peelable state. In the case of this embodiment, the lid material 3 is entirely adhered to the back surface 22b of the main body portion 22 in the resin container 2.

The remaining lid portion 4 includes a base layer 6 made of metal foil through which the contained item T can be pressed through, and a heat-sealable adhesive layer 7 disposed between the base layer 6 and the resin container 2 and bonded to the back surface 22b of the main body portion 22. In this embodiment, a first printed layer 11 that is visible from the resin container 2 side (front surface side) is formed between the base layer 6 and the heat-sealable adhesive layer 7.

The base layer 6 is made of a thin metal foil that can be pressed through. When the PTP 1 is opened, with the peel-off lid portion 5 peeled off, a force is applied to the contained item T through the storage portion 21, pushing the contained item T into the remaining lid portion 4, and the base layer 6 of the remaining lid portion 4 is broken by the contained item T.

As described below, when opening the PTP 1, the body 22 of the resin container 2 is bent and cut at the slit 23, and the remaining lid 6 (base layer 6) in the portion that overlaps the slit 23 in the thickness direction is also cut.

Aluminum foil is preferred as the metal foil used for the base layer 6, as it can be torn apart together with the slit portion 23 when the PTP 1 is opened, and can be torn apart by pushing after the peel-off lid portion 5 is peeled off.

The thickness of the base layer 6 is not particularly limited as long as it does not impair the objective of the present invention, but is preferably 9 μm or more and 24 μm or less, more preferably 12 μm or more and 21 μm or less, and even more preferably 15 μm or more and 19 μm or less.

The heat-sealable adhesive layer 7 is for adhering the lid material 3 to the body 22 of the resin container 2 to seal the contents T contained in the storage section 21 of the resin container 2, and is made of a known heat adhesive for PTPs. The heat-sealable adhesive layer 7 is made of a layer of heat adhesive, such as a polyester adhesive, a polypropylene adhesive, a vinyl chloride adhesive, or a vinyl chloride-vinyl acetate copolymer adhesive (vinyl chloride-vinyl acetate adhesive).

In this embodiment, the heat-sealable adhesive layer 7 is set to a thickness that does not impede the visibility of the first printed layer 11. Therefore, the user can see the first printed layer 11 arranged on the surface of the base layer 6 through the resin container 2.

The first printed layer 11 is printed with characters or the like that display information about the contained object T and other information, and is provided by a known printing method using known colored printing inks. Such a first printed layer 11 is formed on the surface of the base layer 6 made of metal foil. The first printed layer 11 is formed by a gravure printing method or the like using printing ink that contains a colorant (pigment) such as carbon black, phthalocyanine blue, phthalocyanine green, quinacridone, azo, titania, etc., in a binder resin.

In other embodiments, the first printed layer need not be formed on the lid material, in which case the heat sealable adhesive layer 7 may be laminated directly onto the surface side of the base layer 6.

The peelable lid portion 5 is laminated on the back side of the remaining lid portion 4, and has a function of reinforcing the base material layer 6 so that it is not easily torn (CR function). The release layer 8 arranged on the outermost side of the peelable lid portion 5 is fully adhered to the base material layer 6 of the remaining lid portion 4 with such a force that it cannot be easily peeled off by children such as infants. This prevents children (infants) from accidentally pushing through the base material layer 6 of the remaining lid portion 4 and removing the contained item T from the storage portion 21.

The peel-off lid portion 5 of this embodiment includes a reinforcing layer 10 that reinforces the remaining lid portion 5, such as the base layer 6, and a release layer 8 that is disposed between the reinforcing layer 10 and the base layer 6 and is peelably adhered to the base layer 6. Furthermore, the peel-off lid portion 5 of this embodiment includes a second printed layer 12 and a protective layer (overprint layer) 13.

The reinforcing layer 10 in this embodiment is a composite reinforcing layer including a resin reinforcing layer 10A1 made of a resin film and a metal reinforcing layer 10A2 made of a metal foil. The resin reinforcing layer 10A1 is disposed on the resin container 2 side, and the metal reinforcing layer 10A2 is disposed on the outer side of the resin reinforcing layer 10A1 (i.e., at a position farther from the remaining lid portion 5 than the resin reinforcing layer 10A1). The resin reinforcing layer 10A1 is laminated on the surface side of the metal reinforcing layer 10A2 via an adhesive layer 19. The adhesive layer 19 is formed by a known bonding method such as a dry lamination method or a wet lamination method.

The resin reinforcement layer 10A1 has appropriate strength and flexibility, and functions to reinforce the base layer 6 of the remaining lid portion 4 when the PTP 1 is unopened, and also functions to prevent the growth of cracks in the thickness direction of the lid material 5 that occur from the remaining lid portion 6 side as a result of the body portion 22 of the resin container 2 being bent and divided at the slit portion 23 when the PTP 1 is opened.

There are no particular limitations on the material of the resin film used in the resin reinforcement layer 10A1, so long as it does not impair the objective of the present invention. For example, polyester films such as polyethylene terephthalate and polybutylene terephthalate are preferred from the viewpoint of ensuring appropriate strength and flexibility.

There are no particular limitations on the thickness of the resin reinforcement layer 10A1 as long as it does not impair the objective of the present invention, but for example, it is preferably 10 μm or more, more preferably 12 μm or more, even more preferably 14 μm or more, preferably 40 μm or less, more preferably 30 μm or less, and even more preferably 20 μm or less.

The metal reinforcement layer 10A2, together with the resin reinforcement layer 10A1, has the function of reinforcing the base layer 6 of the remaining lid portion 4. The metal reinforcement layer 10A2 also has the function of reinforcing the resin reinforcement layer 10A1 to suppress the growth of a crack in the thickness direction of the lid material 5 that occurs from the remaining lid portion 6 side as a result of the slit portion 23 being severed when the PTP 1 is opened.

There are no particular limitations on the metal foil used for the metal reinforcing layer 10A2 as long as it does not impair the objective of the present invention, but for example, aluminum foil, etc., is used.

The thickness of the metal reinforcing layer 10A2 is not particularly limited as long as it does not impair the object of the present invention, but for example, it is preferably 10 μm or more, more preferably 12 μm or more, even more preferably 14 μm or more, preferably 40 μm or less, preferably 30 μm or less, and more preferably 20 μm or less. In addition, the thickness of the metal reinforcing layer 10A2 may be set to be greater than or equal to the thickness of the resin reinforcing layer 10A1, if necessary.

As described above, the release layer 8 is disposed between the reinforcing layer 10 and the base layer 6, and is releasably adhered to the base layer 6. The front side of the release layer 8 is entirely adhered to the back side of the base layer 6 in a releasable state. The back side of the release layer 8 is adhered to the front side of the adhesive layer 9 formed on the front side of the reinforcing layer 10 (resin reinforcing layer 10A1).

The release layer 8 is made of at least one material selected from the group consisting of acrylic resin, soluble nitrocellulose, vinyl chloride-vinyl acetate resin, polyolefin resin, etc.

The release layer 8 is not particularly limited as long as it does not impair the object of the present invention, but for example, the mass after drying is formed in the range of 0.01 g/m ² or more and 3 g/m ² or less. In addition, the peel strength of the release layer 8 (peel strength of the peel lid portion 5) is preferably less than 8 N/15 mm, more preferably 6 N/15 mm or less. When the peel strength value of the release layer 8 is in such a range, the peelability of the peel lid portion 5 is ensured while the CR property is ensured. In addition, the lower limit of the peel strength of the release layer 8 is not particularly limited as long as it does not impair the object of the present invention, but for example, it is preferably 0.8 N/15 mm or more. The method for measuring the peel strength of the release layer 8 (peel strength of the peel lid portion 5) will be described later.

The adhesive layer 9 is formed by a known adhesion method such as a dry lamination method, a wet lamination method, etc. The adhesive layer 9 is formed so that the mass after drying is in the range of 1 g/ ^m2 or more and 6 g/ ^m2 or less, for example.

The second printed layer 12 is formed on the back side (outside) of the reinforcing layer 10 (metal reinforcing layer 10A2), and a known transparent protective layer (overprint layer) 13 is formed to cover the second printed layer 12 from the outside.

The second printed layer 12, like the first printed layer 11, is basically printed with characters or the like that display information about the contained object T and other information, and is applied by a known printing method using known colored printing inks.

Examples of resins used in the protective layer 13 include epoxy resins, melamine resins, nitrocellulose resins, butyral resins, acrylic resins, urethane resins, amino resins, polyethylene resins, polystyrene resins, polypropylene resins, polyester resins, vinyl chloride resins, polyvinyl alcohol, ethylene-vinyl acetate copolymers, ethylene-vinyl alcohol copolymers, ethylene-ethyl acrylate copolymers, polyamides, and the like. These may be used alone or in combination of two or more. Since the protective layer 13 is made of a transparent resin, the second printed layer 12 can be seen through the protective layer 13 from the back side of the PTP 1 (the side opposite the resin container 2).

In addition, the PTP 1 of this embodiment is provided with a gripping portion 1A to facilitate peeling off the peel-off lid portion 5 from the remaining lid portion 4 when opening.

As shown in FIG. 1 etc., the gripping area 1A is provided at the end of the PTP 1. Specifically, the gripping area 1A is made up of the portion of the resin container 2 from the slit portion 23 to the end 22c of the main body portion 22, and is made up of a detachable portion 2A that can be detached from the slit portion 23, and an overlapping portion 3A that is made up of a portion of the lid material 3 that overlaps with the detachable portion 2A in the thickness direction.

The slit portion 23 is a groove-shaped cut formed in the surface 22a of the main body portion 22 of the resin container 2 to form a gripping margin 1A at the end of the PTP 1. The position of the slit portion 23 is set appropriately taking into consideration the size of the gripping margin 1A that is easy for the user to grasp. Such a slit portion 23 is disposed on the surface 22a side of the main body portion 22 in the resin container 2, between the storage portion 21 and the end 22c of the main body portion 22.

Methods for forming the slit portion 23 at a predetermined location on the main body portion 22 include known forming methods using, for example, a Thomson blade, a laser, etc.

The portion of the main body 22 where the slit 23 is provided is not divided before opening. The depth of the slit 23 (depth of the groove) is set appropriately taking into consideration the ease of dividing the main body 22 at the slit 23, etc.

The PTP1 of this embodiment has a dividing section 30 on its back side for dividing the multiple storage sections 21 into a predetermined number of sections (e.g., one at a time). The dividing section 30 is provided at a position overlapping the main body section 22 of the resin container 2. The dividing section 30 is provided by being cut from the back side of the lid material 3 (the side opposite the resin container 2) toward the resin container 2. In the dividing section 30, the lid material 3 (the peelable lid section 5 and the remaining lid section 4) of the PTP1 is cut, and a small slit-shaped groove is formed on the back side 22b of the main body section 22 so that the resin container 2 can be divided.

As shown in FIG. 1, the storage section 21 for storing the object T is disposed between the slit section 23 and the dividing section 30 in the planar direction (left-right direction) of the PTP1. In another embodiment, the dividing section 30 may be formed by forming a plurality of through holes that penetrate the PTP1 and are spaced apart from each other and arranged in a row (so-called perforated cutting lines).

Next, a method for opening the PTP1 will be described with reference to FIG. 2. FIG. 2 is a cross-sectional view that shows a schematic diagram of the opening operation of the press-through package of the first embodiment. When a user opens the PTP1, first, the user grasps the storage section 21 side of the PTP1 with one hand (e.g., the left hand) and grasps the grasping portion 1A with the other hand (e.g., the right hand) between the thumb and index finger. Then, while grasping the grasping portion 1A, the end of the PTP1 is bent downward starting from the slit portion 23. This causes the slit portion 23 to break, and the force of the breaking causes a crack in the thickness direction so that the base layer 6 of the remaining lid portion 4 is also broken.

When the slit portion 23 is severed, the detachable portion 2A constituting part of the gripping portion 1A is severed from the body portion 22 of the resin container 2. When the remaining lid portion 4 is severed in conjunction with the detachment of the slit portion 23, the severed portion is stacked on the back side of the detachable portion 2 and constitutes part of the gripping portion 1A.

In the case of this embodiment, when a crack occurs in the thickness direction from the front side to the back side of the lid material 3 due to the division of the slit portion 23 as described above, the crack grows to the release layer 8 and the adhesive layer 9, but does not grow to the reinforcing layer 10 (resin reinforcing layer 10A1, etc.) located below. In other words, the reinforcing layer 10 (resin reinforcing layer 10A1, etc.) can prevent the growth of the crack in the thickness direction, and it remains intact even after the division of the slit portion 23.

After a crack is formed in the thickness direction of the lid material 3 as described above, the gripping margin 1A is pulled so that it wraps around the back side of the PTP 1, and the peelable lid portion 5 of the lid material 3 is peeled off from the remaining lid portion 4 side. The end of the peelable lid portion 5 forms an overlapping portion 3A together with the part of the remaining lid portion 4 that remains on the gripping margin 1A. Therefore, the gripping margin 1A is connected to the peelable lid portion 5.

The adhesive strength at the interface between the base layer 6 of the remaining lid portion 4 and the release layer 8 of the peelable lid portion 5 is set to be smaller than the adhesive strength at other interfaces near that interface (e.g., the interface between the release layer 8 and the adhesive layer 9, the interface between the adhesive layer 9 and the reinforcing layer 10 (resin reinforcing layer 10A1), etc.). Therefore, even if the crack in the lid material 3 exceeds the interface between the base layer 6 and the release layer 8 due to the division of the slit portion 23, peeling occurs preferentially at the interface between the base layer 6 and the release layer 8. In this way, the peelable lid portion 5 can be reliably peeled off at the interface between the base layer 6 and the release layer 8.

In this embodiment, the peeling of the peel-off lid portion 5 (peel between the base layer 6 and the release layer 8) stops when it reaches the dividing portion 30 (an example of a stopping portion). In this way, in this embodiment, only the portion of the peel-off lid portion 5 that covers the target storage portion 21 can be selectively peeled off.

After the peelable lid portion 5 is peeled off from the remaining lid portion 4, a force is applied to the object T in the storage portion 21 from the front side through the storage portion 21, and the object T is pushed into the remaining lid portion 4. The pushed object T then breaks through the portion of the remaining lid portion 4 that covers the opening 21A of the storage portion 21, and is removed from the storage portion 21 of the PTP1.

As described above, the PTP 1 of this embodiment has a lid material 3 that has a structure that allows the peelable lid portion 5 including the reinforcing layer 10 to be easily peeled off from the remaining lid portion 4 when opened. Such a PTP 1 has a child resistance (CR) function and is configured to be easy for the user to open when necessary.

In addition, the PTP1 of this embodiment has a dividing section 30 at a predetermined location on the back side of the lid material 3, and the dividing section 30 determines the range of the peelable lid section 5 to be peeled off. Therefore, when the peelable lid section 5 is peeled off using the gripping margin 1A, the peeling interface (the interface between the base layer 6 and the release layer 8) exceeds the opening 21A of the storage section 21 and reaches the dividing section 30, where the peeling interface is interrupted. In this way, the peelable lid section 5 within the range between the slit section 23 and the dividing section 30 can be selectively peeled off from the remaining lid section 4. Therefore, the PTP1 of this embodiment can safely and easily remove only the target stored object T from the PTP1. Moreover, if there is another storage section 21 outside the dividing section 30, the peelable lid section 5 covering the opening 21A of that storage section 21 will not be peeled off unnecessarily.

In this embodiment, the end of the peeling lid portion 5, which is peeled off using the gripping margin 1A, is determined using the dividing portion 30 for dividing the PTP 1 into individual pieces. However, in other embodiments, the end of the peeling lid portion may be determined using, for example, a cut portion (an example of a stop portion) specially provided in the lid material. In this case, the cut portion cuts the lid material (at least the peeling lid portion) in the thickness direction, and there is no need to form a slit-shaped cut or the like in the resin container. The dividing portion 30 exemplified in embodiment 1 is also an example of a stop portion.

In addition, in the PTP1 of this embodiment, the first printed layer 11 can be seen from the front side of the PTP1, and the second printed layer 12 can be seen from the back side of the PTP1. Therefore, the first printed layer 11 and the second printed layer 12 can be seen from both sides of the PTP1, and the PTP1 can be used safely.

The present invention will be described in more detail below with reference to examples. Note that the present invention is not limited to these examples.

Example 1
A PTP of Example 1 was produced having the same basic structure as the PTP 1 shown in Fig. 1. The configurations of the resin container and the lid material of Example 1 are as follows.

<Resin container>
A resin container 2 was made using polyvinyl chloride (PVC).

<Covering material>
As the base layer 6, an aluminum foil (manufactured by UACJ Foil Corporation, thickness: 17 μm, 1N30-H18) with a first printed layer 11 formed on its front surface was prepared. A vinyl chloride-vinyl acetate adhesive (product name "1E", manufactured by Sakuranomiya Chemical Co., Ltd.) was applied to the front surface of the base layer 6 using a bar coater (application amount: 3.7 g/m ² ), and the applied product was dried at 120°C for 10 seconds to form a heat-sealable adhesive layer 7. As the resin reinforcing layer 10A1, a polyethylene terephthalate film (PET film) (manufactured by Toyobo Co., Ltd., thickness: 16 μm) was prepared. As the metal reinforcing layer 10A2, an aluminum foil (manufactured by UACJ Foil Corporation, thickness: 17 μm, 1N30-H18) with a second printed layer 12 and a protective layer (OP coat) 13 formed on its back surface was prepared. Then, a two-liquid curing type dry lamination adhesive was used to form an adhesive layer 19 on the surface of the metal reinforcing layer 10A2. Specifically, 10 parts by mass of product name "Dic Dry LX500" (manufactured by DIC Graphics Corporation) was used as the base agent, and 1 part by mass of product name "KW75" (manufactured by DIC Graphics Corporation) was used as the curing agent, and the mixture was laminated on the metal reinforcing layer 10A2 with a coating amount of 5.0±0.5 g/ ^m2 using a bar coater to form the adhesive layer 19. Then, the resin reinforcing layer 10A1 was attached to the adhesive layer 19 to obtain the reinforcing layer 10.

A product name "S-01 Clear" (manufactured by Tanaka Chemical Co., Ltd.) was applied to the back surface of the base layer 6 with a bar coater in an amount of 1.3±0.5 g/ ^m2 , and the applied product was dried at 180°C for 10 seconds to obtain a release layer 8. On the other hand, an adhesive layer 9 was formed by using a two-component curing dry lamination adhesive in a form laminated to the resin reinforcing layer 10A1 of the reinforcing layer 10. The adhesive layer 9 was formed in the same manner as the adhesive layer 19. Then, the back surface of the release layer 8 was bonded to the adhesive layer 9. In this manner, the lid material 3 of Example 1 was produced.

<PTP>
The resin container 2 and the lid material 3 were bonded together by heat sealing under the conditions of a sealing temperature of 150° C., a sealing pressure of 0.2 MPa, and a sealing time of 1 second to produce the PTP 1 of Example 1 containing a tablet (content T). A slit portion 23 was formed on the surface of the PTP 1 (resin container 2) using a Thomson blade, and a division portion 30 was formed on the back surface of the PTP 1.

Comparative Example 1
A PTP 100 (see FIG. 3) of Comparative Example 1, which has a different lid material configuration from that of Example 1, was produced in the following procedure. The resin container 2 had the same configuration as that of Example 1.

A polyester film (transparent resin film) (product name "Tearfine", manufactured by Toyobo Co., Ltd., thickness 14 μm) with a first printed layer 111 formed on its front surface side was prepared as the base material layer 106. A polyester-based adhesive (product name "B-9", manufactured by Tanaka Chemical Co., Ltd.) was applied to the front surface side of the base material layer 106 using a bar coater (application amount: 3.6 g/m ² ), and the applied product was dried at 120° C. for 10 seconds to form a heat-sealable adhesive layer 107. An aluminum foil (manufactured by UACJ Foil Co., Ltd., thickness: 25 μm, 1N30-H18) with a second printed layer 112 and a protective layer (OP coat) 113 formed on its back surface was prepared as the reinforcing layer 110.

On the surface of the reinforcing layer 110, the product name "MF790PTPOP Varnish" (manufactured by Toyo Ink Co., Ltd.) was applied with a bar coater in an amount of 1.3±0.5 g/m ² , and the applied product was dried at 180° C. for 10 seconds to obtain a release layer 108. Then, an adhesive layer 109 was formed by using a two-liquid curing dry lamination adhesive in a form laminated on the release layer 108. The adhesive layer 109 was formed in the same manner as the adhesive layer 19 in Example 1. Then, the back surface of the base layer 106 was attached to the adhesive layer 109. In this manner, the lid material 103 of Comparative Example 1 was produced. Also, as in Example 1, the resin container 2 and the lid material 103 were attached by heat sealing to produce a PTP 100 of Comparative Example 1 containing a tablet (content T). As in the first embodiment, the slit portion 23 and the dividing portion 30 were formed in the PTP 100 .

Comparative Example 2
A PTP 200 (see FIG. 4) of Comparative Example 2, which has a different lid configuration from that of Example 1, was produced in the following procedure. The resin container 2 had the same configuration as that of Example 1.

An aluminum foil (manufactured by UACJ Foil Corporation, thickness: 17 μm, 1N30-H18) with a first printed layer 211 formed on its front surface was prepared as the base layer 206. A vinyl chloride-vinyl acetate adhesive (product name "1E", manufactured by Sakuramiya Chemical Co., Ltd.) was applied to the front surface of the base layer 206 using a bar coater (application amount: 3.7 g/m ² ), and the applied product was dried at 120° C. for 10 seconds to form a heat-sealable adhesive layer 207. An aluminum foil (manufactured by UACJ Foil Corporation, thickness: 17 μm, 1N30-H18) with a second printed layer 212 and a protective layer (OP coat) 213 formed on its rear surface was prepared as the reinforcing layer 210.

A release layer 208 was formed on the surface of the reinforcing layer 210 in the same manner as in Comparative Example 1. Then, an adhesive layer 209 was formed by using a two-component curing dry lamination adhesive in a manner that is laminated on the release layer 208. The adhesive layer 209 was formed in the same manner as the adhesive layer 19 in Example 1. Then, the back surface of the base layer 206 was attached to the adhesive layer 209. In this manner, the lid material 203 of Comparative Example 2 was produced. Also, as in Example 1, the resin container 2 and the lid material 203 were attached by heat sealing to produce the PTP 200 of Comparative Example 2 that contains a tablet (content T). Note that, as in Example 1, the slit portion 23 and the division portion 30 were formed in the PTP 200.

The PTPs of Example 1 and each of the comparative examples were evaluated as follows.

[Peelability]
For the PTPs of Example 1 and each of the comparative examples, the outer edge (grab margin) of the slit portion was gripped with fingertips, and the peelability (peelability) of the peelable lid portion was evaluated according to the following criteria. The results are shown in Table 1.
<Standards>
・The removable lid can be removed... "Good"
・The removable cover cannot be removed.

In Example 1, the peelable lid portion could be peeled off from the remaining lid portion at the interface between the base layer and the release layer. In Comparative Example 1, the base layer did not break, and the lid material was peeled off together with the base layer from the resin container at the interface between the resin container and the base layer. In Comparative Example 2, all layers including the reinforcing layer were broken in the thickness direction from the slit portion, and the PTP was divided into two at the slit portion. In Comparative Example 2, the remaining lid portion and the peelable lid portion remained at the opening of the storage portion.

[Peel strength]
From the lid material of the PTP in Example 1 and each of the comparative examples (i.e., the PTP in Example 1) that could be peeled off at the release layer, a rectangular test piece having a width of 15 mm was prepared. Then, a 180-degree peel test was performed on the test piece at a rate of 150 mm/min, and the peel strength (N/15 mm) of the peelable lid portion was measured. The results are shown in Table 1. Note that in Comparative Example 1 and Comparative Example 2, the peel strength was not measured (shown as "-").

[Pushability]
The ease of breaking the lid material (pushability) when removing the contents was evaluated according to the following criteria using each PTP used in the peelability evaluation. The results are shown in Table 1. In Comparative Example 1, the entire base material layer was peeled off from the resin container during the peelability evaluation, and the contents could be removed at that stage, so the pushability was not evaluated (shown as "-"). In Comparative Example 2, the peelable lid portion could not be peeled off during the peelability evaluation, so the pushability was evaluated with the peelable lid portion attached (a state in which the remaining portion and the peelable lid portion remained at the opening of the storage portion).
<Standards>
・The tablet can be easily pushed out by breaking through the lid.
・The lid feels hard when being pushed through, but the tablet can still be pushed out... "△"

As shown in Table 1, the PTP of Example 1 has excellent peelability and pushability. It was confirmed that this PTP has not only a CR function, but also a so-called senior-friendly (SF) function. If the peel strength exceeds 6 N/15 mm, the peelable lid portion becomes difficult to peel from the remaining lid portion (relatively more force is required to peel), causing problems with peelability.

Comparative Example 1 is a case where a polyester film was used as the base layer. In Comparative Example 1, it was confirmed that it was difficult to tear the polyester film when it was cleaved from the first slit portion.

Comparative Example 2 is a case in which a 17 μm thick aluminum foil was used as the reinforcing layer, but the 16 μm thick PET film used in Example 1 was not used. In this case, it was confirmed that the reinforcing layer was torn apart when the first slit was torn open, and the PTP was split at the first slit.

<Other embodiments>
The present invention is not limited to the embodiments described above and illustrated in the drawings, and the following embodiments, for example, are also included within the technical scope of the present invention.

(1) In the PTP of the above embodiment, other known layers may be laminated to the lid material as long as the purpose of the present invention is not impaired.

(2) As another embodiment, the PTP 300 may have a configuration as shown in FIG. 5. Specifically, the lid material 303 may be provided with a printed layer (printed layer exposed after peeling) 311 that is arranged between the release layer 8 and the base layer 6 and is visible when the peelable lid portion 5 is peeled off from the remaining lid portion 304. According to such a PTP 300, by peeling off the peelable lid portion 5 from the remaining lid portion 304 along the release layer 8, the characters printed on the printed layer 311 are revealed, so that the user can focus on the characters and easily obtain information. In addition, since the printed layer 311 is partially formed so as to be scattered on the back side of the base layer 6, the back side of the base layer 6 at the portion where the printed layer 311 is not formed is in direct contact with the heat sealable adhesive layer 7. In addition, such a printed layer may be arranged between the release layer 8 and the resin reinforcement layer 10A1.

1... PTP, 1A... gripping area, 2... resin container, 21... storage section, 22... main body, 3... lid material, 4... remaining lid section, 5... peelable lid section, 7... heat sealable adhesive layer, 8... release layer, 9... adhesive layer, 10... reinforcement layer, 10A1... resin reinforcement layer, 10A2... metal reinforcement layer, 11... first printed layer, 12... second printed layer, 13... protective layer

Claims (5)

The present invention relates to a resin container having a sheet-like main body including a front surface and a back surface, and a container-like storage section that bulges outward from the front surface and opens to the back surface side to store an object to be stored, and a sheet-like lid material that is adhered to the resin container so as to overlap the main body while covering the storage section from the back surface side,
the lid material is a press-through package having a remaining lid portion including a base layer made of a metal foil through which the contained item can be pressed through, and a heat-sealable adhesive layer disposed between the base layer and the resin container and adhered to the main body portion, and a peel-off lid portion including a reinforcing layer that reinforces the remaining lid portion, and a release layer disposed between the reinforcing layer and the base layer and adhered in a peelable manner to the base layer,
the resin container has a slit portion formed on the front surface side of the main body portion,
The reinforcing layer includes a resin reinforcing layer made of resin,
The lid material is disposed at least either between the release layer and the base material layer or between the release layer and the resin reinforcement layer, and is provided with a post-peel exposed printed layer that is visible when the peel-off lid portion is peeled off from the remaining lid portion . The press-through package according to claim 1, wherein the reinforcing layer is made of metal foil and includes a metal reinforcing layer disposed farther from the remaining lid portion than the resin reinforcing layer. the slit portion is disposed on the front surface side of the main body portion between the storage portion and an end portion of the main body portion,
3. The press-through package according to claim 1 or 2, further comprising: a gripping portion including a portion from the slit portion to the end portion of the main body portion and capable of being separated from the slit portion; and an overlapping portion including a portion of the lid material that overlaps with the tear-off portion in a thickness direction. The lid material has a stop portion consisting of a cut portion that cuts at least the peelable lid portion in the thickness direction,
The press-through package according to any one of claims 1 to 3, wherein the stopping portion overlaps with the main body portion when viewed in a plan view, and the storage portion is disposed between the stopping portion and the slit portion. the remaining lid portion is disposed between the base material layer and the resin container and has a first printed layer visible from the resin container side,
The peel-off lid portion is arranged on the surface of the reinforcing layer opposite the release layer, and has a second printed layer that is visible from the side opposite the resin container. The press-through package according to any one of claims 1 to 4 .

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