DE102021125316A1 - COVER AND PRESS-THROUGH PACKING - Google Patents

Abstract

[Objective] To provide a cover maintaining a childproof function with a simple structure and easy detachment of a detachable cover portion from a remaining cover portion during opening. [Means for Solving the Problem] A cover includes a remaining cover portion 4 and a detachable cover portion 5. The remaining covering portion 4 comprises a base layer 6, a heat-sealing adhesive layer 7 and a release layer 8. The base layer 6 is crushable by pressing. The heat-sealing adhesive layer 7 is arranged on a first surface 6a of the base layer 6 . The separating layer 8 is arranged on a second surface 6b of the base layer 6 . The detachable cover portion 5 includes a reinforcing layer 10 formed of a metal foil to reinforce the base layer 6 . The release liner is removably attached to a surface of the backing sheet 10 .

Description

[TECHNICAL AREA]

The present disclosure relates to a cover and a blister pack.

[STATE OF THE ART]

Press-through packages (hereafter referred to as PTPs, press-through packages) can be used for packs of tablets, capsules or other types of medicines. Each PTP includes a plastic container and a cover. The plastic container includes pockets in which items such as medicines are received. The cover is connected to the plastic case to cover openings of the bags. When the PTP is opened, a force is applied via the pocket to the object in the respective pocket and the object is pressed against the cover. The pushed object breaks through a portion of the cover covering the opening of the pocket in question to open the PTP.

The well-known PTPs were designed with a focus on ease of opening, so even children can easily open the PTPs. So children could accidentally open the PTPs. In recent years, child-resistant (hereinafter referred to as CR, child-resistant) PTPs have been proposed so that children cannot easily open the PTPs.

Patent Document 1 discloses a PTP including a container sheet and a cover in the form of a sheet attached to the container sheet. The PTP cover comprises a base layer and a cover film. The base layer comprises an aluminum foil which is crushable. The top film is coated onto the base layer and can be peeled off. The PTP includes a non-adhesive processing area in which no adhesive processing is performed. The non-adhesive processing area is at an interface between edge portions of the base layer and the cover film of the cover. A portion of the cover film in the non-tack processing area is used as a holding portion for opening the PTP.

[PRIOR ART DOCUMENT]

[patent document]

[Patent Document 1]
Japanese Unexamined Patent Application Laid-Open No. 2005-82179

[SUMMARY OF THE INVENTION]

[Problem to be Solved by the Invention]

An infant could hold the holding portion of the PTP between its teeth and open the PTP.

In addition, the cover of the PTP has a complicated layered structure. A layer other than the cover film, which includes a holding portion and is attached to the base layer, can be peeled off from another layer at an intermediate interface (e.g., between the aluminum foil of the base layer and an adjacent layer). When such peeling occurs, the peelability of the cover film becomes unstable.

Due to the complexity of the layered structure of the PTP's cap, manufacturing processes can be complicated.

The technology described here was developed in view of the above circumstances. An object is to provide a cover that has a childproof function in a simple structure and includes a detachable cover portion that is easily detachable from a remaining cover portion. Another object is to provide a blister pack that includes the cover.

[Means to Solve the Problem]

• <1> Eine Abdeckung umfasst einen verbleibenden Abdeckungsabschnitt und einen ablösbaren Abdeckungsabschnitt. Der verbleibende Abdeckungsabschnitt umfasst eine Basisschicht, eine heißsiegelnde Klebeschicht und eine Trennschicht. Die Basisschicht ist durch Drücken zerbrechbar. Die heißsiegelnde Klebeschicht befindet sich auf einer ersten Oberfläche der Basisschicht. Die Trennschicht befindet sich auf einer zweiten Oberfläche der Basisschicht. Der verbleibende Abdeckungsabschnitt umfasst eine Verstärkungsschicht, die aus einer Metallfolie gebildet ist, um die Basisschicht zu verstärken. Die Trennschicht ist entfernbar an einer Oberfläche der Verstärkungsschicht befestigt.
• <2> Die Basisschicht der in <1> beschriebenen Abdeckung umfasst eine Metallfolie oder einen Kunststofffilm.
• <3> Die Basisschicht der in <1> beschriebenen Abdeckung umfasst einen transparenten Kunststofffilm. Der verbleibende Abdeckungsabschnitt der in <1> beschriebenen Abdeckung umfasst eine erste Aufdruckschicht, die zwischen der Basisschicht und der Trennschicht angeordnet und von einer ersten Oberflächenseite der Basisschicht aus sichtbar ist.
• <4> Die Basisschicht der in <1> beschriebenen Abdeckung umfasst einen transparenten Kunststofffilm. Der ablösbare Abdeckungsabschnitt der in <1> beschriebenen Abdeckung umfasst eine erste Aufdruckschicht, die auf der Oberfläche der Verstärkungsschicht gebildet und durch den verbleibenden Abdeckungsabschnitt sichtbar ist.
• <5> Die Verstärkungsschicht des ablösbaren Abdeckungsabschnitts der in einem der Punkte <1> bis <4> beschriebenen Abdeckung ist entfernbar an der Trennschicht befestigt.
• <6> Eine Durchdrückpackung umfasst einen Kunststoffbehälter und die in einem der Punkte <1> bis <5> beschriebene Abdeckung. Der Kunststoffbehälter umfasst Taschen, in denen Gegenstände aufgenommen werden, und weist eine Blattform auf. Die Abdeckung wird auf dem Kunststoffbehälter befestigt, um die Öffnungen der Taschen zu bedecken.

Means for solving the above problems are as follows.

• <1> A cover includes a remaining cover portion and a detachable cover portion. The remaining cover portion includes a base layer, a heat seal adhesive layer, and a release liner. The base layer is crushable by pressing. The heat seal adhesive layer is on a first surface of the base layer. The release layer is on a second surface of the base layer. The remaining cover portion includes a reinforcement layer formed of metal foil to reinforce the base layer. The release liner is removably attached to a surface of the backing liner.
• <2> The base layer of the cover described in <1> comprises a metal foil or a plastic film.
• <3> The base layer of the cover described in <1> comprises a transparent plastic film. The remaining cover portion of the cover described in <1> comprises a first print layer disposed between the base layer and the release layer and visible from a first surface side of the base layer.
• <4> The base layer of the cover described in <1> comprises a transparent plastic film. The peelable cover portion of the cover described in <1> comprises a first printed layer formed on the surface of the backing layer and visible through the remaining cover portion.
• <5> The reinforcing layer of the detachable covering portion of the covering described in any one of <1> to <4> is removably attached to the release layer.
• <6> A blister pack comprises a plastic container and the cover described in any one of <1> to <5>. The plastic container includes pockets in which items are received and has a sheet shape. The cover is attached to the plastic container to cover the openings of the bags.

[Advantageous Effects of the Invention]

According to the present invention, there is provided a cover that has a childproof function in a simple structure and includes a detachable cover portion that is easily detachable from a remaining portion. Also provided is a blister pack that includes the cover.

character list

• 1 12 is a cross-sectional view schematically showing a configuration of a blister pack according to a first embodiment.
• 2 Fig. 12 is a cross-sectional view schematically showing the detachment of a peelable cover portion of a cover from a remaining cover portion in the blister pack.
• 3 Fig. 12 is an explanatory view schematically showing a method of bonding (thermally bonding) a heat-sealing adhesive layer of the cover to a body of a plastic container using a heat roller.
• 4 12 is a cross-sectional view schematically showing a configuration of a blister pack according to a second embodiment.
• 5 12 is a cross-sectional view schematically showing a configuration of a blister pack according to a third embodiment.
• 6 FIG. 12 is a cross-sectional view schematically showing detachment of a detachable cover portion of a cover from a remaining cover portion in FIG 5 blister pack shown.
• 7 14 is a cross-sectional view schematically showing a configuration of a blister pack according to a fourth embodiment.
• 8th FIG. 12 is a cross-sectional view schematically showing detachment of a detachable cover portion of a cover from a remaining cover portion in FIG 7 blister pack shown.
• 9 12 is a cross-sectional view schematically showing a configuration of a blister pack according to a fifth embodiment.
• 10 FIG. 12 is a cross-sectional view schematically showing detachment of a detachable cover portion of a cover from a remaining cover portion in FIG 9 blister pack shown.
• 11 14 is a cross-sectional view schematically showing a configuration of a blister pack according to Comparative Example 3. FIG.

[MODES FOR CARRYING OUT THE INVENTION]

<First Embodiment>

A blister pack 1 according to a first embodiment is described with reference to FIG 1 until 3 described. 1 14 is a cross-sectional view showing a configuration of the blister pack 1 according to the first embodiment. The blister pack 1 is a child resistant pack for holding items T (such as tablets, capsules and other types of medication).

The press-through package (PTP) 1 includes a plastic container 2 and a cover 3. The plastic container 2 is sheet-shaped and includes pockets 21 in which the items T are received. The cover 3 is attached to the plastic case 2 to cover openings 21a of the bags 21. FIG.

The plastic container 2 is made of a known plastic resin for PTPs. The plastic container 2 is made of transparent thermoplastic such as polyvinyl chloride, polyvinylidene chloride, polypropylene and amorphous polyethylene terephthalate. The plastic container 2 comprises a body 22 having a sheet shape and the pockets 21 protruding from the body 22 to the outside. Typically, multiple pockets 21 are formed. In 1 only one pocket 21 is shown for better explanation. The pockets 21 include recesses that define spaces S for receiving the items T therein. The pockets 21 include the openings 21a at the boundaries between the body 22 and the pockets 21. Each pocket 21 has an outline that runs along an outline of the object T in plan view. The plastic container 2 is formed by processing a sheet having a thickness of about 60 µm to 400 µm into a predetermined shape.

The cover 3 comprises a remaining cover section 4 and a peelable cover section 5. The remaining cover section 4 comprises a base layer 6, a heat-sealing adhesive layer 7 and a release layer 8. The base layer 6 is crushable by pressing. The heat-sealing adhesive layer 7 is located on a first surface 6a of the base layer 6 opposite the plastic container 2. The separating layer 8 is arranged on a second surface 6b of the plastic container 2 facing away from the plastic container 2. The release layer 8 adjoins the second surface 6b of the base layer 6 with an adhesive layer 9 between the base layer 6 and the second surface 6b of the base layer 6 .

The base layer 6 consists of a thin material which is crushable by pressing. When a force is applied to the object T via the pocket 21 to open and the object T is pressed against the remaining cover portion 4, the base layer 6 of the remaining cover portion 4 is pressed by the object T and broken. The base layer 6 can be formed of a plastic film. Specifically, in this embodiment, the base layer 6 may be formed of a transparent plastic film having light transmittance.

The transparent plastic film may be a polyester film made of polyethylene terephthalate, polybutylene terephthalate or other types of polyester.

The thickness of the base layer 6 is not limited as long as the object of the present invention can be achieved; however, it may preferably be in a range from 9 μm to 24 μm.

The base layer 6 is formed of the transparent plastic film in this embodiment. As in 1 shown, a user U can apply a first print layer 11 adjacent to the second surface surface 6b of the base layer 6 (on a side opposite to the plastic container 2) through the remaining cover portion 4 can be visually recognized. The heat-sealing adhesive layer 7 and the adhesive layer 9 are so thick that the visibility of the first print layer 11 is not impaired.

The heat sealing adhesive layer 7 attaches the cover 3 to the body 22 of the plastic container 2 to seal the items T in the pockets 21 of the plastic container 2. The heat-sealing adhesive layer 7 consists of a known hot-melt adhesive for PTPs. Specifically, a polyester-based adhesive, a polypropylene-based adhesive, a vinyl chloride-based adhesive, a vinyl chloride-vinyl acetate-based adhesive (a vinyl chloride-acetate-based adhesive) can be used for the heat-sealing adhesive layer 7 .

The release sheet 8 is bonded to a first surface 10a of a backing sheet 10 of the detachable cover portion 5 . The release layer 8 detachably holds the detachable cover portion 5 . For the release layer 8, at least one can be selected from the group consisting of acrylic, nitrocellulose, vinyl chloride acetate-based resin and polyolefin resin.

The release layer 8 is not limited as long as the object of the present invention can be achieved; however, it may be preferred that the mass of the separating layer 8 after drying is in the range from 0.01 g/m ² to 3 g/m ² . It is preferable that the peeling strength for peeling off the release sheet 8 (the peeling strength for removing the peelable covering portion 5) is less than 2.0N/15mm and equal to or less than 1.8N/15mm. When the peeling strength for peeling off the release liner 8 is within such a range, the peelable covering portion 5 maintains an appropriate level of ease of peeling and an appropriate level of CR. The lower limit of the peeling strength for peeling off the release liner 8 is not limited as long as the object of the present invention can be achieved; however, it is preferable that the peel strength is equal to or greater than 0.8 N/15 mm. A method of measuring the peeling strength for removing the release liner 8 (the peeling strength for removing the peelable covering portion 5) will be described later.

The separating layer 8 is adjacent to the second surface 6b of the base layer 6 , with the adhesive layer 9 being located between the separating layer 8 and the second surface 6b of the base layer 6 . For example, a known bonding method such as a dry lamination method and a wet lamination method can be used. A mass of the adhesive layer 9 after drying may range from 1 g/m ² to 2 g/m ² .

The detachable cover portion 5 is laminated on the remaining cover portion 4 before the PTP 1 is opened, so the push-breakable base layer 6 is not easily broken. Namely, the peelable covering portion 5 has a reinforcing function (the CR function) to reinforce the base layer 6 and other layers. With this embodiment, a child (or an infant) is less likely to break the base layer of the remaining cover portion 4 by pushing and take out the item T placed in the pocket 21 of the PTP 1 . Before the PTP 1 is opened, the release sheet 8 and the backing sheet 10 are bonded together with a strength that does not allow the child or infant to easily separate the release sheet 8 and the backing sheet 10 from each other. When the PTP 1 is opened, the detachable cover section 5 is peeled off from the remaining cover section 4 .

The peelable cover portion 5 includes the reinforcing layer 10 reinforcing the base layer 6 . The separating layer 8 is connected to the first surface 10a of the reinforcing layer 10 facing the plastic container 2 in such a way that the separating layer 8 can be detached. The reinforcing layer 10 is formed of a metal foil such as aluminum foil. The thickness of the reinforcing layer 10 is not limited as long as the object of the present invention can be achieved; however, the thickness is preferably in the range of 10 µm to 40 µm.

The peelable cover portion 5 includes the first print layer 11 on the first surface 10a facing the plastic container 2. As shown in FIG.

The first printed layer 11 includes information about the objects T or other information. The first print layer 11 is formed by a known printing method using a known color ink for printing. The first print layer 11 includes portions distributed on the first surface 10a of the reinforcing layer 10 formed of the metal foil. The first imprint layer 11 is formed by a gravure printing method using printing ink containing a colorant (a pigment) contained in a binder resin. Examples of the colorant include carbon black, phthalocyanine blue, phthalocyanine green, quinacridone series, azo series, and titanium dioxide. The user U can visually recognize the first print layer 11 from one side of the plastic container 2 through the remaining cover portion 4 .

The peelable covering portion 5 includes a second print layer 12 on a second surface 10b of the backing layer 10. Namely, in this embodiment, a print layer (the first print layer 11, the second print layer 12) is formed on each surface of the backing layer 10. The second print layer 12 includes information about the objects T and other information similar to the first print layer. The second print layer 12 is formed by a known printing method using a known color ink for printing. The second imprint layer 12 is formed on the second surface 10b of the reinforcing layer 10 formed of a metal foil to partially or completely cover the second surface 10b.

The releasable cover portion 5 includes a known transparent protective layer 13 (an overprint layer) adjacent the second surface 10b of the backing layer 10 to cover the second overprint layer 12. FIG. Examples of the resin used for the protective layer 13 include epoxy resin, melamine resin, nitrocellulose resin, butyral resin, acrylic resin, urethane resin, amino resin, polyethylene resin, polystyrene resin, polypropylene resin, polyester resin, vinyl chloride resin, polyvinyl alcohol resin, ethylene-vinyl acetate copolymer, ethylene-vinyl alcohol copolymer, ethylene-acrylate copolymer and polyamide. One or a combination of these can be used.

With the PTP 1 in this embodiment, the detachable cover portion 5 of the cover 3 is peeled off from the remaining cover portion 4 during opening. Specifically, the backing layer 10 of the peelable cover portion 5 is separated from the release liner 8 of the remaining cover portion 4 at the interface between the backing layer 10 and the release liner 8 . Although the first printed layer 11 is on the first surface 10a of the reinforcing layer 10 formed of the metal foil, portions of the first surface 10a of the reinforcing layer 10 on which the portions of the first printed layer 11 are formed do not directly contact the release layer 8 because the portions of the first print layer 11 are distributed on the first surface 10a. Namely, the reinforcing layer 10 of the peelable cover portion 5 is removably attached to the release layer 8 of the remaining cover portion 4 .

2 is a cross-sectional view of FIG 1 illustrated blister pack 1, which shows schematically the detachment of the detachable cover portion 5 from the remaining cover portion 4. When opening the PTP 1, the user removes the peelable cover portion 5 at an edge of the cover 3, so that the reinforcing layer 10 and the release layer 8 are separated from each other at the interface.

The adhesiveness at the interface between the reinforcing layer 10 of the peelable covering section 5 and the release layer 8 of the remaining covering section 4 is defined lower than the adhesiveness at other interfaces (e.g. an interface between the adhesive layer 9 and the release layer 8 of the remaining covering section 4, an interface between the adhesive layer 9 and the base layer 6 of the remaining cover section 4, an interface between the reinforcement layer 10 and the protective layer 13 of the release cover section 5, an interface between the reinforcement layer 10 and the second print layer 12 of the release cover section 5). When a force is applied to the edge of the PTP 1 with a fingertip of the user when opening the PTP 1, the reinforcing layer 10 of the peelable cover portion 5 is preferentially peeled from the release layer 8 of the remaining cover portion 4 at the interface. As described above, the reinforcing layer 10 formed of the metal foil is properly peeled off from the release layer 8 at the interface.

After the peelable cover portion 5 is peeled off from the remaining cover portion 4 , an external force is applied to the object in the pocket 21 via the pocket 21 , and the object T is pushed toward the remaining cover portion 4 . The pressed object T breaks through the portion of the remaining cover portion 4 covering the opening 21a of the pocket 21, and thus the object T is taken out from the pocket 21 of the PTP1.

As described above, in this embodiment, the PTP 1 and the cover 3 keep the CR function with the simple structure. Further, the detachable cover portion 5 can be easily peeled off from the remaining cover portion 4 upon opening.

As described above, the base layer 6 of the PTP 1 in this embodiment is formed of the transparent plastic film having light transmittance. Therefore, the first print layer 11 on the first surface 10a of the reinforcing layer 10 is visible from the plastic container 2 side. In this embodiment, the printed layers including the information about the objects T are formed not only on an outer surface (the second surface 10b) of the reinforcing layer 10 formed of the metal foil but also on an inner surface (the first surface 10a) corresponding to the the plastic container 2 faces.

In the PTP 1 in this embodiment, the detachable cover portion 5 including the reinforcing layer 10 formed of the metal foil is located further outward relative to the plastic container 2 than the remaining cover portion 4 . A heat roller contacts the detachable cover portion 5 to bond the heat-sealing adhesive layer 7 of the cover 3 to the body 22 of the plastic container 2 (thermal bonding). 3 12 is an explanatory view schematically showing a method of bonding (thermally bonding) a heat-sealing adhesive layer 7 of the cover 3 to the body 22 of the plastic container 2 using the heat roller H. FIG. As in 3 As shown, the peelable covering portion 5 comprising the metal foil (reinforcing layer 10) is disposed adjacent to the heat roller H, and thus higher heat resistance is achieved. Therefore, the cover 3 and the plastic container 2 are heated to a high temperature from the detachable cover portion 5 side and bonded to each other by heat sealing. Namely, the PTP 1 in this embodiment has a productive configuration.

<Second embodiment>

A blister pack 1A according to a second embodiment of the present invention is described with reference to FIG 4 described. 4 14 is a cross-sectional view schematically showing a configuration of the blister pack 1A according to a second embodiment. The PTP 1A in this embodiment includes the plastic case 2 and a cover 3A. The plastic container 2 and the objects T are the same as in the first embodiment. The PTP 1A in this embodiment includes the cover 3A instead of the cover 3 in the first embodiment. A basic configuration of the cover 3A is similar to that of the first embodiment, that is, the cover 3A includes a cover remaining portion 4A and a cover detachable portion 5A.

The remaining cover portion 4A in this embodiment includes a base layer 6A different from one in the first embodiment. Specifically, the base layer 6A is formed of a metal foil such as aluminum foil which is breakable by pressing. A metal foil widely used for PTPs is used. For example, an aluminum foil that is widely used for PTPs (e.g., a cemented carbide with a thickness of about 10 μm to 20 μm such as 1N30, 1070, 1100, 8021, 8079 in Japanese Industrial Standards) can be used.

The configuration of the remaining cover portion 4A other than the base layer 6A is similar to that of the first embodiment. The remaining covering portion 4A comprises the heat-sealing adhesive layer 7, the release layer 8 and the adhesive layer 9. The heat-sealing adhesive layer 7 is on a first surface 6Aa of the base layer 6A. The separating layer 8 is arranged adjacent to the second surface 6b of the base layer 6A. The adhesive layer 9 is interposed between the release layer 8 and the base layer 6A.

A peelable covering portion 5A in this embodiment has a configuration similar to the peelable covering portion 5 in the first embodiment except for the first print layer 11 (see the first embodiment) which is not included in the peelable covering portion 5A. The peelable covering portion 5A comprises the reinforcing layer 10, the second print layer 12 and the protective layer 13, which are similar to the first embodiment. The second print layer 12 is formed on the outer surface 10b of the reinforcing layer 10 (on a side opposite to the plastic container 2). The protective layer 13 is formed on the surface 10b of the backing layer 10 to cover the second print layer 12. As shown in FIG. The release layer 8 of the remaining cover portion 4A is removably attached to a first surface 10a, facing the plastic container 2, of the reinforcing layer 10 of the detachable cover portion 5A in this embodiment.

The PTP 1A and the cover 3A in this embodiment keep the CR function with the simple structure. Further, the detachable cover portion 5A can be easily peeled off from the remaining cover portion 4A upon opening.

Specifically, in this embodiment, the PTP 1A and the cap 3A include the base layer 6A of the remaining cap portion 4A, which is formed of the metal foil that is widely used for PTPs. According to the PTP 1A and the cover 3A in this embodiment, the objects T can be easily taken out from the plastic container 2 by pressing as usual after detaching the detachable cover portion 5A.

The detachable covering portion 5A in this embodiment includes the reinforcing layer 10 formed of the metal foil, similarly to the first embodiment. Therefore, the cover 3A and the plastic container 2 are easily connected to each other by heat sealing, i. H. this embodiment has a productive configuration.

<Third embodiment>

A blister pack 1B according to a third embodiment is described with reference to FIG 5 described. 5 14 is a cross-sectional view schematically showing a configuration of the blister pack 1B according to the third embodiment. The PTP 1B in this embodiment includes the plastic case 2 and a cover 3B. The plastic container 2 and the objects T held in the plastic container 2 are similar to the first embodiment. The PTP 1B includes the cover 3B instead of the cover 3 in the first embodiment. The cover 3B includes a remaining cover portion 4B and a detachable cover portion 5B, similarly to the first embodiment. A first print layer 11B is located on the remaining cover portion 4B in the PTP 1B in this embodiment, which is different from the first embodiment. The first print layer 11B is sandwiched between an adhesive layer 9B of the remaining cover portion 4B and a release layer 8B.

The remaining cover portion 4B comprises a base layer 6B, a heat-sealing adhesive layer 7B and a release layer 8B. The base layer 6B is formed of a transparent plastic film (e.g. polyester film) which is crushable similarly to the first embodiment. The heat-sealing adhesive layer 7B is on a first surface 6Ba of the base layer 6B. The release layer 8B, the adhesive layer 9B and the first print layer 11B are laminated on a second surface 6Bb of the base layer 6B such that the adhesive layer 9B and the first print layer 11B are between the release layer 8B and the second surface 6Bb. As in 5 As shown, the adhesive layer 9B is formed on the second surface 6Bb of the base layer 6B. The first print layer 11B is formed on the adhesive layer 9B. The release layer 8B is formed to contact the first print layer 11B.

The first print layer 11B is formed in an entire area between the adhesive layer 9B and the release layer 8B. The first print layer 11B includes information about the objects T and other information. The first printing layer 11B is visible from the side of the plastic container 2 through the remaining cover portion 4B. The heat-sealing adhesive layer 7B and the adhesive layer 9B are so thick that the visibility of the first print layer 11B is not impaired. The base layer 6B, the heat-sealing adhesive layer 7B, the adhesive layer 9B and the release layer 8B are similar to those in the first embodiment. The first overprint layer 11B is substantially similar to the first embodiment; however, the adhesiveness between the first print layer 11B and the release layer 8B and the adhesiveness between the first print layer 11B and the adhesive layer 9B in this embodiment should be greater than the adhesiveness between the release layer 8B and a backing layer 10B of the peelable cover portion 5B.

The peelable cover portion 5B includes the reinforcing layer 10B, a second print layer 12B, and a protective layer 13B. The reinforcing layer 10B is formed of a metal foil (eg, aluminum foil) to reinforce the base layer 6B. The second print layer 12B is formed on an outer surface 10Bb (on a side opposite to the plastic container 2) of the reinforcing layer 10B. The second print layer 12B is similar to the first embodiment. The protective layer 13B is formed on the outer surface 10Bb of the reinforcing layer 10B to cover the second print layer 12B. The protective layer 13B is similar to the first embodiment. The release layer 8B of the remain The covering portion 4B is detachably attached to a surface 10Ba, facing the plastic container 2, of the reinforcing layer 10B of the detachable covering portion 5B.

The detachable cover portion 5B in this embodiment is laminated on the remaining cover portion 4B before the PTP 1 is opened, similarly to the first embodiment. The peelable cover portion 5B has the reinforcing function (the CR function) to reinforce the base layer 6B so that the push-breakable base layer 6B is less likely to be broken.

6 FIG. 12 is a cross-sectional view schematically showing the detachment of the detachable cover portion 5B from the remaining cover portion 4B in FIG 5 shown blister pack 1B. Upon opening the PTP 1B, the user removes the peelable cover portion 5B from the remaining cover portion 4B at an edge of the cover 3B so that the release layer 8B and the backing layer 10B are separated at an interface between the release layer 8B and the backing layer 10B.

After the peelable cover portion 5B is peeled off from the remaining cover portion 4B, a force is applied from the outside to the article T in the pocket 21 via the pocket 21, and the article T is pushed toward the remaining cover portion 4B. The pressed object T breaks through a portion of the remaining cover portion 4B covering the opening 21a of the pocket 21, and thus the object T is taken out from the pocket of the PTP 1B.

The PTP 1B and the cover 3B in this embodiment described above keep the CR function with the simple structure, similarly to the first embodiment. Further, the detachable cover portion 5B can be easily peeled off from the remaining cover portion 4B upon opening.

In the PTP 1B of this embodiment, the base layer 6B is formed of the transparent plastic film having light transmittance similarly to the first embodiment. Therefore, the first print layer 11B formed between the release layer 8B and the adhesive layer 9B is visible from the plastic container 2 side. In the PTP 1B in this embodiment, after the peelable cover portion 5B is peeled off from the remaining cover portion 4B, the first print layer 11B remains on the plastic container 2 as a component of the remaining cover portion 4B. In order to obtain the information about the objects T, i. H. the first print layer 11B on the plastic container 2, after the peelable cover portion 5B has been removed, the PTP 1B is preferred in this embodiment. In another embodiment, the first imprint layer 11B may be partially formed between the release layer 8B and the adhesive layer 9B.

The detachable covering portion 5B of this embodiment includes the reinforcing layer 10B formed of the metal foil, similarly to the first embodiment. Therefore, the cover 3B and the plastic container 2 are easily connected to each other by heat sealing, i. H. this embodiment has a productive configuration.

<Fourth embodiment>

A blister pack 1C according to a fourth embodiment of the present invention is described with reference to FIG 7 described. 7 14 is a cross-sectional view schematically showing a configuration of the blister pack 1C according to the fourth embodiment. The PTP 1C in this embodiment includes the plastic case 2 and a cover 3C. The plastic container 2 and the objects T placed in the plastic container 2 are similar to those of the first embodiment. The PTP 1C includes the cover 3C instead of the cover 3 in the first embodiment. The cover 3C includes a remaining cover portion 4C and a detachable cover portion 5C similarly to the first embodiment. The PTP 1C in this embodiment includes a first print layer 11C in the remaining cover portion 4C, which is different from the first embodiment. The first overprint layer 11C is sandwiched between a base layer 6C of the remaining cover portion 4C and an adhesive layer 9C.

The remaining covering portion 4C comprises the base layer 6C, a heat-sealing adhesive layer 7C and a release layer 8C similarly to the first embodiment. The base layer 6C is formed of a transparent plastic film (e.g. polyester film) breakable by pressing is. The heat-sealing adhesive layer 7C is on a first surface 6Ca of the base layer 6C. The release layer 8C is opposed to a second surface 6Cb of the base layer 6C. The first imprint layer 11C and an adhesive layer 9C are laminated on the second surface 6Cb, and the release layer 8C is laminated on the adhesive layer 9C. As in 7 As shown, the first overprint layer 11C is formed on the second surface 6Cb of the base layer 6C. The adhesive layer 9C is formed on the first print layer 11C. The release layer 8C is formed on the adhesive layer 9C.

The first imprint layer 11C is formed in an entire area between the base layer 6C and the adhesive layer 9C. The first print layer 11C includes information about the objects T and other information. The first printing layer 11C is visible from the side of the plastic container 2 through the remaining cover portion 4C. The heat-sealing adhesive layer 7C is so thick that the visibility of the first print layer 11C is not impaired. The base layer 6C, the heat-sealing adhesive layer 7C, the adhesive layer 9C and the release layer 8C are similar to those in the first embodiment. However, in this embodiment, the adhesiveness between the first print layer 11C and the base layer 6C and the adhesiveness between the first print layer 11C and the adhesive layer 9C should be greater than the adhesiveness between the release layer 8C and a backing layer 10C of the peelable cover portion 5C.

The peelable covering portion 5C includes the reinforcing layer 10C, a second imprint layer 12C and a protective layer 13C. The reinforcing layer 10C is formed of a metal foil (eg, aluminum foil) to reinforce the base layer 6C. The second print layer 12C is formed on an outer surface 10Cb (on a side opposite to the plastic container 2) of the reinforcing layer 10C similarly to the first embodiment. The protective layer 13C is arranged opposite to the outer surface 10Cb of the reinforcing layer 10C to cover the second print layer 12C, similarly to the first embodiment. The release sheet 8C of the remaining cover portion 4C is removably attached to a surface 10Ca of the reinforcing sheet 10C. The detachable cover portion 5C faces the plastic case 2, similarly to the first embodiment.

The detachable cover portion 5C in this embodiment is laminated on the remaining cover portion 4C before opening, similarly to the first embodiment. The detachable covering portion 5C has a reinforcing function (the CR function) to reinforce the base layer 6C which is crushable so that the base layer 6C is less likely to be broken.

8th FIG. 12 is a cross-sectional view schematically showing detachment of the detachable cover portion 5C from the remaining cover portion 4C in FIG 7 shown blister pack 1C. Upon opening the PTP 1C, the user removes the removable cover portion 5C from the remaining cover portion 4C at an edge of the cover 3C so that the release liner 8C and the backing layer 10C are separated at an interface between the release liner 8C and the backing layer 10C.

After the peelable cover portion 5C is peeled off from the remaining cover portion 4C, an external force is applied to the article T in the pocket 21 via the pocket 21, and the article T is pushed toward the remaining cover portion 4C. The pressed object T breaks through a portion of the remaining cover portion 4C covering the opening 21a of the pocket 21, and thus the object T is taken out from the pocket 21 of the PTP 1C.

The PTP 1C and the cover 3C in this embodiment described above keep the CR function with the simple structure, similarly to the first embodiment. Further, the detachable cover portion 5C can be easily peeled off from the remaining cover portion 4C upon opening.

In the PTP 1C of this embodiment, the base layer 6C is formed of the transparent plastic film having light transmittance similarly to the first embodiment. Therefore, the first print layer 11C formed between the release layer 8C and the adhesive layer 9C is visible from the plastic container 2 side. In the PTP 1C in this embodiment, after the peelable cover portion 5C is peeled off from the remaining cover portion 4C, the first print layer 11C remains on the plastic container 2 as a component of the remaining cover portion 4C. In this way, in order to keep the information about the objects T, ie the first printing layer 11C on the plastic container 2, after the peelable cover portion 5C is removed, the PTP 1C is used form of leadership preferred. In another embodiment, the first imprint layer 11C may be partially formed between the release layer 8C and the adhesive layer 9C.

The detachable covering portion 5C of this embodiment includes the reinforcing layer 10C formed of the metal foil, similarly to the first embodiment. Therefore, the cover 3C and the plastic container 2 are easily connected to each other by heat sealing, i. H. this embodiment has a productive configuration.

<Fifth embodiment>

A blister pack 1D according to a fifth embodiment of the present invention is described with reference to FIG 9 described. 9 12 is a cross-sectional view schematically showing a configuration of the blister pack 1D according to the fifth embodiment. The PTP 1D in this embodiment includes the plastic case 2 and a cover 3D. The plastic container 2 and the objects T placed in the plastic container 2 are similar to the first embodiment. The PTP 1D includes the cover 3D instead of the cover 3 in the first embodiment. The cover 3D includes a remaining cover portion 4D and a remaining cover portion 5D similarly to the first embodiment. The PTP 1D in this embodiment includes a first print layer 11D contained in the remaining cover portion 5D, similarly to the first embodiment. However, the first imprint layer 11D is formed in an entire area between a release layer 8D and a backing layer 10D, which is different from the first embodiment.

The remaining covering portion 4D comprises a base layer 6D, a heat-sealing adhesive layer 7D and a release layer 8D similarly to the first embodiment. The base layer 6D is formed of a transparent plastic film (e.g., polyester film) breakable by pressing. The heat-sealing adhesive layer 7C is on a first surface 6Da of the base layer 6C. The separating layer 8D is arranged opposite to a second surface 6Db of the base layer 6D. An adhesive layer 6D is laminated on the second surface 9Db of the base layer 6D. As in 9 As shown, the adhesive layer 9D is formed on the second surface 6Db of the base layer 6D. The release layer 8D is formed on the adhesive layer 9D.

The peelable covering portion 5D includes the reinforcing layer 10D, a second print layer 120, and a protective layer 13D. The reinforcing layer 10D is formed of a metal foil (e.g., aluminum foil) to reinforce the base layer 6D. The second print layer 120 is formed on an outer surface 10Db (on a side opposite to the plastic container 2) of the reinforcing layer 10D, similarly to the first embodiment. The protective layer 13D is arranged opposite to the outer surface 10Db of the reinforcing layer 10D to cover the second imprint layer 120, similarly to the first embodiment. The peelable cover portion 5D includes the first print layer 11D formed on the surface 10Da of the reinforcing layer 10D facing the plastic container 2. As shown in FIG.

The first imprint layer 11D is formed in an entire area between the adhesive layer 9C of the remaining cover portion 4D and the reinforcing layer 10D of the peelable cover portion 5D. The first print layer 11D includes information about the objects T and other information. The first printing layer 11D is visible from the side of the plastic container 2 through the remaining cover portion 4D. The heat-sealing adhesive layer 7D, the adhesive layer 9D and the release layer 8D are so thick that the visibility of the first print layer 11 is not impaired. The base layer 6D, the heat-sealing adhesive layer 7D, the release layer 8C and the adhesive layer 9C are similar to those in the first embodiment.

The release sheet 9D of the remaining cover portion 4D is removably attached to a first surface 5Da of the detachable cover portion 5D facing the plastic container 2. The release layer 9D of the remaining cover portion 4D is removably attached to the first print layer 11D of the peelable cover portion 5D. The adhesiveness between the first print layer 11D and the release layer 8D should be lower than the adhesiveness between the first print layer 11D and the backing layer 10D in this embodiment. The adhesiveness between the first print layer 11D and the release layer 8D should be lower than the adhesiveness between the release layer 8D and the adhesive layer 9D or the adhesiveness between the adhesive layer 9D and the base layer 6D. Since the adhesiveness is defined as described above, peeling of the peelable covering portion 5D becomes orderly at an interface between the first print layer 11D and the release liner 8D during peeling of the peelable cover portion 5D. The adhesiveness between the first print layer 11D and the release layer 8D can be adjusted by using an appropriate binder for the first print layer 11D.

The detachable cover portion 5D in this embodiment is laminated on the remaining cover portion 4D before opening, similarly to the first embodiment. Namely, the detachable covering portion 5D has the reinforcing function (the CR function) to reinforce the base layer 6D, so that the push-breakable base layer 6D is less likely to be broken.

10 12 is a cross-sectional view schematically showing the detachment of the detachable cover portion 5D from the cover remaining portion 4D. When opening the PTP 1D, the user removes the removable cover portion 5D from the remaining cover portion 4D at an edge of the cover 3D so that the release liner 8D and the first print layer 11D are separated at an interface between the release liner DB and the first print layer 11D.

After the peelable cover portion 5D is peeled off from the remaining cover portion 4D, a force is applied to the article T in the bag from the outside via the pocket 21, and the article T is pushed toward the remaining cover portion 4D. The pressed object T breaks through a portion of the remaining cover portion 4D covering the opening 21a of the pocket 21, and thus the object T is taken out from the pocket of the PTP 1D.

The PTP 1D and the cover 3D in this embodiment described above keep the CR function with the simple structure, similarly to the first embodiment. Further, the detachable cover portion 5D can be easily peeled off from the remaining cover portion D when opened.

In the PTP 1D of this embodiment, the base layer 6D is formed of the transparent plastic film having light transmittance similarly to the first embodiment. Therefore, the first print layer 11D formed between the separating layer 8D and the reinforcing layer 10D is visible from the plastic container 2 side.

The detachable covering portion 5D of this embodiment includes the reinforcing layer 10D formed of the metal foil, similarly to the first embodiment. Therefore, the cover 3D and the plastic container 2 are easily connected to each other by heat sealing, i. H. this embodiment has a productive configuration.

Known other layers can be layered on the caps of the PTPs in the first to fifth embodiments as long as the object of the present invention can be achieved.

The present invention will be described in more detail by way of examples. The invention is not limited to the examples.

[Example 1]

A PTP from Example 1 with a basic configuration similar to that in 1 shown PTP 1 was manufactured. The configurations of a plastic container and a cover in Example 1 are as follows.

<Plastic Container>

The plastic container was made using polyvinyl chloride (PVC).

<cover>

A polyester film (a transparent plastic film) (trade name: TEARFINE, TOYOBO CO., LTD., thickness: 14 µm) was prepared as the base layer. A polyester-based adhesive (trade name: B-9, TANAKA CHEMICAL INDUSTRIES, LTD.) was coated on a first surface of the base layer using a bar coater (coverage: 3.6 g/m ² ). The coating was dried at 120°C for 10 seconds, and a heat-sealing adhesive layer was formed. As a reinforcement layer an aluminum foil (manufactured by UACJ FOIL CORPORATION, thickness: 25 µm, 1N30-H18) having a second overprint layer and a protective layer (OP coating) formed on one of the surfaces was used.

One of the surfaces of the backing layer was coated with the product of trade name "MF790 PTP OP Lacquer" (manufactured by TOYO INK CO., LTD.) in an amount of 1.3 ± 0.5 g/m ² using the bar coater. to form the separating layer. Then the coating was dried at 180°C for 10 seconds and a release layer was formed. An adhesive layer was formed on the release liner using a two-part curable adhesive for dry lamination, and an adhesive layer was formed. Specifically, 10 parts by mass of the product with the trade name "DICDRY LX500" (manufactured by DIC GRAPHICS CORPORATION) was used as the base component, and 1 part by mass of the product with the trade name "KW75" (manufactured by DIC GRAPHICS CORPORATION) was used as the hardener. A mixture thereof was formed on the release liner in an amount of 5.0±0.5 g/m ² using the bar coater, and the adhesive layer was formed. The base layer was attached to the adhesive layer. Through these steps, the cover of Example 1 was manufactured. The first overprint layer was not included in the cover of Example 1.

<PTP>

The plastic container and the cover described above were bonded together by heat sealing under conditions including a sealing temperature of 150°C, a sealing pressure of 0.2 MPa, and a sealing time of 1 second. The PTP containing tablets (articles) was prepared according to Example 1.

[Example 2]

A PTP from example 2 with a basic configuration similar to that in 4 shown PTP 1A was manufactured. The configurations of a plastic container and a cover in Example 2 are as follows.

The plastic container was made similarly to Example 1. An aluminum foil (manufactured by UACJ FOIL CORPORATION, thickness: 17 µm, 1N30-H18) was prepared as the base layer. A vinyl chloride acetate-based adhesive (trade name: 1E, manufactured by SAKURANOMIYA CHEMICAL CO., LTD.) was coated on one of the surfaces of the base sheet using the bar coater (amount: 3.7 g/m ² ). The coating was dried at 120°C for 10 seconds, and a heat-sealing adhesive layer was formed. As a reinforcing layer, an aluminum foil (manufactured by UACJ FOIL CORPORATION, thickness: 17 µm, 1N30-H18) having a second overprint layer and a protective layer (OP coating) formed on one of the surfaces was prepared.

One of the surfaces of the backing layer was coated with the product of trade name "MF790 PTP OP Lacquer" (manufactured by TOYO INK CO., LTD.) in an amount of 1.3 ± 0.5 g/m ² using the bar coater. similar to example 1. Then the coating was dried at 180°C for 10 seconds and a release layer was produced. An adhesive layer was formed on the release liner using a two-part curable adhesive for dry lamination, and an adhesive layer was formed. Specifically, 10 parts by mass of the product with the trade name "DICDRY LX500" (manufactured by DIC GRAPHICS CORPORATION) was used as the base component, and 1 part by mass of the product with the trade name "KW75" (manufactured by DIC GRAPHICS CORPORATION) was used as the hardener. A mixture thereof was formed on the release liner in an amount of 5.0±0.5 g/m ² using the bar coater, and the adhesive layer was formed. The base layer was attached to the adhesive layer. Through these steps, the cover of Example 2 was manufactured. The plastic container and cover described above were bonded together by heat sealing. The PTP containing tablets (articles) was prepared according to Example 2.

[Example 3]

A PTP from Example 3 with a basic configuration similar to that in 4 shown PTP 1A was manufactured. The configurations of a plastic container and a cover in Example 3 are as follows.

The plastic container was made similarly to Example 1. As a base sheet, an aluminum foil (manufactured by UACJ FOIL CORPORATION, thickness: 17 µm, 1N30-H18) was prepared similarly to Example 2. A vinyl chloride acetate-based adhesive (trade name: 1E, manufactured by SAKURANOMIYA CHEMICAL CO., LTD.) was coated on one of the surfaces of the base layer (amount: 3.7 g/m ² ) using the bar coater. The coating was dried at 120°C for 10 seconds, and a heat-sealing adhesive layer was formed. As the backing layer, an aluminum foil (manufactured by UACJ FOIL CORPORATION, thickness: 17 µm, 1N30-H18) having a second overprint layer and a protective layer (OP coating) formed on one of the surfaces was used similarly to Example 2.

A product with a trade name of S-01 CLEAR (TANAKA CHEMICAL INDUSTRIES, LTD.) was coated on a first surface of the base layer of the backing layer by the bar coater in an amount of 1.3 ± 0.5 g/m ² . Then the coating was dried at 180°C for 10 seconds and a release layer was formed. An adhesive layer was formed on the release liner using a two-part curable adhesive for dry lamination, and an adhesive layer was formed. Specifically, 10 parts by mass of the product with the trade name "DICDRY LX500" (manufactured by DIC GRAPHICS CORPORATION) was used as the base component, and 1 part by mass of the product with the trade name "KW75" (manufactured by DIC GRAPHICS CORPORATION) was used as the hardener. A mixture thereof was formed on the release liner in an amount of 5.0±0.5 g/m ² using the bar coater, and the adhesive layer was formed. The base layer was attached to the adhesive layer. Through these steps, the cover of Example 3 was manufactured. The plastic container and cover described above were bonded together by heat sealing. The PTP containing tablets (articles) was prepared according to Example 3, similar to Example 1.

[Comparative Example 1]

A PTP according to Comparative Example 1 was produced similarly to Example 1. In comparison with Example 1, instead of the polyester film, cellophane (trade name: MST #300, manufactured by FUTAMURA CHEMICAL CO., LTD.) was used as the base layer and instead of the material used in Example 1 for the release layer, a product with a trade name of No. 20 SEMICLEAR 90 KAI 2 (manufactured by OSAKA PRINTING INK MFG. CO., LTD.) was used as the release layer.

[Comparative Example 2]

A PTP according to Comparative Example 2 was produced similarly to Example 2. Compared to Example 2, an aluminum foil (manufactured by UACJ FOIL CORPORATION, thickness: 20 µm, 1N30-H18) was used for a base layer instead of the base layer of Example 2 (the aluminum foil, thickness: 17 µm, 1N30-H18), an aluminum foil (manufactured by UACJ FOIL CORPORATION, thickness: 40 µm, 8021-0) was used as the backing sheet instead of the backing sheet in Example 2 (the aluminum foil, thickness: 17 µm, 1N30-H18), and the product of trade name No. 20 SEMICLEAR 90 KAI 2 (manufactured by OSAKA PRINTING INK MFG. CO., LTD.) was used for a release layer instead of the material used in Example 2 for the release layer.

[Comparative Example 3]

7 14 is a cross-sectional view schematically showing a blister pack 1X according to Comparative Example 3. FIG. The PTP 1X according to Comparative Example 3 with an in 11 configuration shown was made.

The plastic container 2 is similar to Example 1. An aluminum foil (manufactured by UACJ FOIL CORPORATION, thickness: 20 µm, 1N30-H18) was prepared as the base sheet 6X. A vinyl chloride acetate-based adhesive (trade name: 1E, manufactured by SAKURANOMIYA CHEMICAL CO., LTD.) was coated on a first surface of the base sheet 6X using the bar coater (amount: 3.7 g/m ² ). The coating was dried at 120°C for 10 seconds, and a heat-sealing adhesive layer was formed. A second surface of the base layer 6X was coated with the product of trade name "MF790 PTP OP Lacquer" (manufactured by TOYO INK CO., LTD.) in an amount of 1.3 ± 0.5 g/m ² using the bar coater . Then, the coating was dried at 210°C for 10 seconds, and a release liner 18X1 was prepared.

An aluminum foil (manufactured by UACJ FOIL CORPORATION, thickness: 17 µm, 1N30-H18) having a second overprint layer 12X and a protective layer (OP coating) formed on one of the surfaces was prepared as the reinforcing layer 10X. One of the surfaces of the reinforcing layer 10X was coated with the product of trade name "MF790 PTP OP Lacquer" (manufactured by TOYO INK CO., LTD.) coated at a rate of 1.3 ± 0.5 g/m ² using the bar coater. Then, the coating was dried at 180°C for 10 seconds, and a release liner 18X2 was prepared. An adhesive layer 19X was formed on a release liner 18X using a two-part curable adhesive for dry lamination, and the adhesive layer 19X was formed. Specifically, 10 parts by mass of the product with the trade name "DICDRY LX500" (manufactured by DIC GRAPHICS CORPORATION) was used as the base component, and 1 part by mass of the product with the trade name "KW75" (manufactured by DIC GRAPHICS CORPORATION) was used as the hardener. A mixture thereof was formed on the release layer 18X in an amount of 5.0±0.5 g/m ² using the bar coater, and the adhesive layer 19X was formed. The base layer 6X on which the heat-sealing adhesive layer 7X and the release layer 18X1 were formed was attached to the adhesive layer 19X. Through these steps, the cover 3X of Comparative Example 3 was manufactured. The heat-sealing adhesive layer 7X and the base layer 6X of the cover 3X in Comparative Example 3 correspond to a cover remaining portion 4X. Other components of the cover 3X correspond to the detachable cover portion 5X.

The plastic container 2 and the cover 3X were bonded to each other by heat sealing similarly to Example 1, and the PTP IX containing the tablets T (the articles) according to Comparative Example 3 was manufactured.

The PTPs in Examples and Comparative Examples were evaluated for the following items.

[Ease of detachment]

The detachable cover portions of the PTPs in the examples and the comparative examples were pinched and removed. The releasability (ease of detachment) was determined using standards. The results are shown in Table 1.

<Defaults>

• • The detachable cover section was easily removed: ⊙
• • The detachable cover section was removed, but not easily (resistance was felt): X
• • The removable cover section has not been removed: XX

[peel strength]

The covers in Examples and Comparative Examples were manufactured, and the covers were sampled. Each sample has a rectangular shape with a width of 15 mm. 180 degree peeling tests were conducted under a condition of 150mm/min, and the peeling strengths (N/15mm) of the peelable covering portions were measured. The results are shown in Table 1.

[Ease of Push Through]

The ease of detachment of the covers for taking out the tablets (articles) was determined based on the following standards using the PTPs used for the evaluation of the ease of detachment. The results are shown in Table 1. The peelable covering portion of Comparative Example 2 was not removed in the evaluation of ease of peeling. Therefore, the push-through ease of Comparative Example 2 with the peelable cover portion attached was evaluated.

<Defaults>

• • Die Tablette brach durch die Abdeckung und die Tablette ließ sich leicht herausnehmen : ⊙
• • Die Tablette wurde herausgenommen, aber beim Durchbrechen der Abdeckung war ein Widerstand zu spüren: ◯
• • Die Tablette konnte die Abdeckung nicht zerbrechen und die Tablette wurde nicht herausgenommen: X

[Tabelle 1] Ablöseleichtigkeit Ablösefestigkeit (N/15mm) Durchdrückleichtigkeit Beispiel 1 ⊙ 1,0 ◯ Beispiel 2 ⊙ 1,5 ⊙ Beispiel 3 ⊙ 1,7 ⊙ Vergleichsbeispiel 1 × 7 × Vergleichsbeispiel 2 ×× 18 × Vergleichsbeispiel 3 × 2 ⊙

• • The tablet broke through the cover and the tablet came out easily : ⊙
• • The tablet was removed, but resistance was felt when breaking the cover: ◯
• • The tablet could not break the cover and the tablet was not taken out: X

[Table 1] ease of detachment Peel Strength (N/15mm) push-through ease example 1 ⊙ 1.0 ◯ example 2 ⊙ 1.5 ⊙ Example 3 ⊙ 1.7 ⊙ Comparative example 1 × 7 × Comparative example 2 ×× 18 × Comparative example 3 × 2 ⊙

As shown in Table 1, the PTPs in Examples 1 to 3 are advantageous in peel easiness and punch through easiness. Namely, these PTPs exhibit not only the CR function but also a senior-friendly (SF) function.

Comparative Example 1 included the base sheet formed of cellophane. Comparative Example 1 was not advantageous in terms of easiness to be punched through, and the cellophane was not easily broken. The release layer of Comparative Example 1 was formed of the product of trade name No. 20 SEMICLEAR 90 KAI 2, and thus Comparative Example 1 was not advantageous in terms of ease of peeling.

In Comparative Example 2, the adhesive layer showed cohesive failure at a peeling interface. Therefore, Comparative Example 2 was not advantageous in terms of ease of peeling. Since the peelable covering portion was not peeled off, Comparative Example 2 was not advantageous in terms of ease of puncture.

Comparative Example 3 included two release liners in the cover. One of the release layers was adjacent to the base layer formed from the aluminum foil. The other of the release liners was adjacent to the backing liner formed from the aluminum foil. In Comparative Example 3, an interface between the base layer and the release layer or an interface between the backing layer and the release layer was unstable. For this reason, Comparative Example 3 cannot be advantageous in terms of ease of peeling. Comparative Example 3 was advantageous in terms of ease of push-through.

From the results relating to Examples and Comparative Examples, it may be preferable that the peeling strengths of the peelable covering portions are less than 2N/15mm. If the peeling strengths are over 2N/15mm, the ease of peeling cannot be achieved.

Reference List

1, 1A, 1B

PTP;

2

plastic containers;

3, 3A, 3B

Cover;

4, 4A, 4B

Remaining coverage section;

5, 5A, 5B

Removable cover section;

7

heat-sealing adhesive layer;

8th

release layer;

9

adhesive layer;

10

reinforcement layer;

11

First overprint layer;

12

Second overprint layer;

13

protective layer;

18

release layer

Claims (6)

Coverage comprising: a remaining cover portion comprising: a base layer that is crushable; a heat-seal adhesive layer disposed on a first surface of the base layer; and a release layer disposed on a second surface of the base layer; and a releasable cover portion comprising a reinforcing layer formed of metal foil to reinforce the base layer and including a surface to which the release liner is releasably attached. cover after claim 1 wherein the base layer comprises a metal foil or a plastic film. cover after claim 1 wherein the base layer comprises a transparent plastic film and the remaining cover portion comprises a first printing layer disposed between the base layer and the release layer and visible from a first surface side of the base layer. cover after claim 1 wherein the base layer comprises a transparent plastic film and the releasable cover portion comprises a first printed layer formed on the surface of the backing layer and visible through the remaining cover portion. cover after one of Claims 1 until 4 wherein the reinforcing layer of the peelable cover portion is removably attached to the release liner. A blister pack comprising: a plastic container comprising pockets in which articles are held and having a sheet shape; and the cover after one of the Claims 1 until 5 attached to the plastic container to cover openings of the bags.

Images