JP2018203376A - Press-through package - Google Patents

Abstract

To provide a press-through package that can have a lid material easily peeled off from a sheet type container and maintain quality of a packaged body for a long period.SOLUTION: A press-through package 1 has a sheet type container 2 comprising a plurality of pocket parts 21 in which packaged bodies 5 are put, a lid material 4 arranged on the sheet type container 2 and covering an opening face 211 of the plurality of pocket parts 21, and a seal layer 3 interposed between the sheet type container 2 and lid material 4 and bonding both together. The seal material 3 has a strong seal part 31 and a weak seal part 32 having less peeling strength than the strong seal part 31.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a press-through package.

  2. Description of the Related Art Press-through packages (hereinafter abbreviated as “PTP”) are frequently used as packaging containers for pharmaceutical tablets and capsules. The PTP has a sheet-like container having a plurality of pocket portions in which an article to be packaged is accommodated, and a lid material that is bonded to the sheet-like container and covers the opening surface of the pocket portion.

  In PTP, the tablet etc. normally accommodated in the pocket part can be taken out by a simple operation of pushing the pocket part and extruding the tablet etc. while breaking the lid. However, for example, in a pharmacy, a plurality of types of medicines may be once taken out of the package, and then the medicines may be packaged together for each amount and type taken at one time. In such a case, when trying to take out the tablet etc. which were packaged in PTP, it was necessary to repeat the operation | work which extrudes the tablet etc. which are to be packaged from each pocket part.

  In order to solve such a problem, PTP has been proposed in which a lid member can be peeled off from a sheet-like container and tablets and the like can be taken out from a plurality of pocket portions. For example, Patent Document 1 describes PTP that employs an easy-peeling thermal adhesive layer as a thermal adhesive layer that bonds a lid material and a main body.

JP 2010-254315 A

  The PTP of Patent Document 1 has a lower peel strength between the sheet-like container and the lid material than the conventional PTP in order to allow the lid material to be peeled off from the sheet-like container. Therefore, for example, during storage, the lid material is naturally separated from the sheet-like container, and a gap is easily formed between them. In addition, when a gap is generated between the lid member and the sheet-like container, the pocket portion may communicate with the external space through the gap. In this case, the quality of the package may be impaired by the air that has entered the pocket portion through the gap.

  However, if the peel strength of the lid material is simply increased in order to prevent the lid material from being naturally separated from the sheet-like container during storage or the like, it becomes difficult to peel the lid material from the sheet-like container. Therefore, there is a limit to increasing the peel strength between the lid member and the sheet-like container.

  This invention is made | formed in view of this background, and it is going to provide PTP which can peel off a cover material from a sheet-like container and can maintain the quality of a to-be packaged object over a long period of time. Is.

One aspect of the present invention is a sheet-like container having a plurality of pocket portions in which an article to be packaged is accommodated,
A lid that is disposed on the sheet-like container and covers the opening surfaces of the plurality of pocket portions;
Intervening between the sheet-like container and the lid, and having a seal layer to adhere both,
The seal layer is in a press-through package (PTP) having a strong seal portion and a weak seal portion where the peel strength of the lid material from the sheet-like container is weaker than that of the strong seal portion.

  The PTP has a sheet-like container and a lid member bonded to the sheet-like container via a seal layer. Moreover, the seal layer has a strong seal part and a weak seal part in which the peeling strength of the lid member from the sheet-like container is weaker than the strong seal part.

  The average peel strength of the lid material in the PTP, that is, the peel strength corresponding to the ease of peeling when the user pulls the lid material off the sheet-like container and takes out the package, is the peel strength at the strong seal portion. It is an intermediate value between the strength and the peel strength at the weak seal portion. Thereby, the peeling strength in a strong seal | sticker part can be made stronger compared with the conventional PTP provided with the lid | cover material which can peel, enabling the operation | work which peels off a lid | cover material from a sheet-like container.

  And by providing a strong seal part in a part of seal layer, the state in which the cover material and the sheet-like container were adhered in the strong seal part can be maintained over a long period of time. Therefore, the PTP can suppress natural separation of the lid material from the sheet-like container over a long period of time.

  Further, for example, when the lid material is naturally separated from the sheet-like container for some reason in the weak seal portion, a gap may be formed between the lid material and the sheet-like container. However, even in this case, since the lid member and the sheet-like container are bonded to each other at the strong seal portion, it is possible to suppress further widening of the gap between the lid member and the sheet-like container.

  Thus, the PTP can suppress the natural separation of the lid material from the sheet-like container while enabling the lid material to be peeled off from the sheet-like container. Moreover, also when a part of cover material isolate | separates naturally for some reason, the expansion of the clearance gap between a cover material and a sheet-like container can be suppressed. As a result, the pocket portion can be prevented from communicating with the external space, and the quality of the packaged object can be maintained over a long period of time.

It is the top view which looked at PTP in Example 1 from the sheet-like container side. It is the II-II sectional view taken on the line of FIG. It is an enlarged view of the edge part of the width direction in FIG. It is a partial arrow directional cross-sectional view in the middle of peeling off a cover material from the sheet-like container of Example 1. FIG. It is a partial arrow directional cross-sectional view (figure equivalent to FIG. 4) in the middle of peeling the cover material which has a support film and aluminum foil in Example 2 from a sheet-like container. It is a partial arrow sectional view (figure equivalent to Drawing 4) in the middle of peeling off a lid from a sheet-like container of Example 3. It is explanatory drawing of the peeling strength measurement in an experiment example. It is explanatory drawing of the puncture strength measurement in an experiment example. It is a top view of the seal layer in which the strong seal part and the weak seal part were extended in the direction inclined with respect to the longitudinal direction of PTP. It is a top view of the seal layer in which many weak seal parts which present a circle are arranged at equal intervals. It is a top view of the sealing layer by which the weak seal part is arrange | positioned at the grid | lattice form. It is a top view of the seal layer by which the strong seal part is arrange | positioned around the pocket part. It is a top view of the seal layer in which the weak seal part is biased. It is a top view of the seal layer by which the strong seal part which exhibits a ring is arranged around the pocket part. It is a top view of the sealing layer by which the strong seal | sticker part was arrange | positioned on the dividing line. It is a top view of the seal layer by which the weak seal part is arrange | positioned on the dividing line. It is a top view of the seal layer by which a strong seal part is arrange | positioned over the perimeter and the perimeter of the outer periphery part of PTP. It is a top view of another aspect of the seal layer in which the strong seal portion is arranged on the dividing line and over the entire circumference of the outer peripheral edge of the PTP. It is an example of another aspect of arrangement | positioning of a strong seal part and a weak seal part. It is an example of another aspect of arrangement | positioning of a strong seal part and a weak seal part.

  In the PTP, as the sheet-like container, a known container for PTP can be adopted. Specifically, a sheet material having a thickness of 60 to 400 μm made of a thermoplastic resin such as polyvinyl chloride, polyvinylidene chloride, polypropylene, and amorphous polyethylene terephthalate can be used for the sheet-like container.

  The sheet-like container is provided with a plurality of pocket portions that are recessed from the periphery. The pocket portion has a shape that matches the shape of an object to be accommodated such as a pharmaceutical tablet or capsule in a plan view.

  A lid material is bonded to the sheet-like container via a seal layer. On the outer surface of the lid, that is, the surface opposite to the surface bonded to the seal layer, a layer for displaying information on the packaged object, such as a white colored layer, a colored layer, a character printed layer, a pattern printed layer, Layers for protecting the above-described white colored layer, such as an anchor coat layer and an overcoat layer, may be provided.

  As the lid member, for example, an aluminum foil can be employed. More specifically, for example, an aluminum foil having a thickness of 10 to 30 μm made of 1000 series aluminum, 3000 series aluminum alloy, and 8000 series aluminum alloy can be used as the lid. The aluminum foil may be a hard material or a soft material.

  Further, the lid member may include an aluminum foil laminated on the sealing layer and a support film made of resin and provided on the aluminum foil. In this case, it is possible to further increase the tensile strength of the lid member as compared with the case where no support film is provided. Therefore, it is possible to more surely prevent the lid material from being broken in the operation of peeling the lid material from the sheet-like container.

  Moreover, in this case, the piercing strength of the lid member can be further increased as compared with the case where the support film is not provided. Therefore, the PTP can be provided with a function called a child resistance function that prevents the infant from pushing the packaged object out of the pocket by mistake.

  As the support film, for example, a film having a thickness of 2 to 16 μm made of a resin having relatively high heat resistance, such as polyethylene terephthalate, polyethylene naphthalate, nylon, and polycarbonate can be employed. As a method for adhering the support film and the aluminum foil, for example, a known adhesion method such as a dry lamination method or a wet lamination method can be employed.

  The lid member preferably has a puncture strength of 3.0 to 5.0 N when a test tool having a hemispherical tip having a diameter of 1.0 mm is pushed in at a speed of 50 mm / min. . By setting the piercing strength of the lid material within the specific range, it is difficult for an infant to break the lid material when the pocket portion is pushed in. Therefore, it can suppress more reliably that an infant accidentally pushes out the package from a pocket part.

  Between the lid material and the sheet-like container, there is a seal layer that bonds them together. The seal layer may have a single-layer structure having only an adhesive layer made of an adhesive, or may have a multilayer structure having a plurality of adhesive layers. The seal layer may have a multilayer structure further including an adhesive layer and a layer made of a material other than the adhesive. Examples of the adhesive that can be used include heat-weld adhesives such as polyolefin adhesives, vinyl chloride-vinyl acetate copolymer adhesives, acrylic adhesives, and polyester adhesives. These adhesives may be used independently and may use 2 or more types together.

  Further, the seal layer is provided with a strong seal portion having a relatively strong peel strength and a weak seal portion having a peel strength lower than that of the strong seal portion.

  The peel strength at the strong seal portion can take various values depending on the material of the sheet-like container, the material of the seal layer, the heat welding conditions, and the like. For example, when a sheet-like container made of vinyl chloride with a thickness of 250 μm is used and the lid material and the sheet-like container are thermally welded under the conditions of a temperature of 150 ° C., a pressure of 0.1 MPa, and a pressurization time of 1 second, The peel strength according to the 180 degree peel test at a moving speed of 200 mm / min can be set to 7 to 12 N / 15 mm. When the peel strength at the strong seal portion is weakened, the lid material is easily separated from the sheet-like container, and a gap is easily generated between the two. On the other hand, when the peel strength at the strong seal portion is increased, the average peel strength of the lid member increases, and it may be difficult to peel off the lid member. By setting the peel strength at the strong seal portion to 7 to 12 N / 15 mm, it is possible to keep the state where the sheet-like container and the lid material are bonded for a long period of time while allowing the lid material to be peeled off. it can.

  The shape, number and arrangement of the strong seal portions can take various forms. For example, the strong seal portion may take various shapes such as a circle, a ring, a quadrangle, a straight line, or a curve in a plan view as viewed from the PTP stacking direction. Further, the number of strong seal portions in the PTP may be one or a plurality of locations. When there are a plurality of strong seal portions, a regular arrangement such as making the interval between adjacent strong seal portions constant may be used, or the arrangement may be random.

  Further, the strong seal portions may be arranged uniformly in a plan view viewed from the stacking direction of the PTP, or may be arranged in a biased manner. In the case where the strong seal portions are arranged in a biased manner, for example, the interval between some strong seal portions is made wider than the interval between other strong seal portions, or some strong seal portions are made larger than other strong seal portions. It is possible to adopt a mode such as increasing the size.

  It is preferable that the strong seal portion is disposed around the entire circumference of the pocket portion. That is, it is preferable that the entire circumference around the pocket portion is surrounded by the strong seal portion. In this case, when the lid material is naturally separated from the sheet-like container for some reason in the weak seal portion, the sheet-like container and the lid material are bonded in the strong seal portion arranged around the pocket portion. Can be maintained. As a result, it is possible to more effectively suppress the pocket portion from communicating with the external space and maintain the quality of the packaged object for a longer period.

  When the strong seal portion is disposed as described above, the number of pocket portions surrounded by the strong seal portion may be one or may be two or more. For example, the strong seal portion can be disposed around each pocket portion. Further, the strong seal portion may be disposed so as to surround two or more pocket portions adjacent to each other, or the strong seal portion may be disposed so as to surround all pocket portions provided in the PTP.

  The peel strength at the weak seal portion can take various values depending on the material of the sheet-like container, the material of the seal layer, the heat welding conditions, and the like, similarly to the strong seal portion. For example, when a sheet-like container made of vinyl chloride with a thickness of 250 μm is used and the lid material and the sheet-like container are thermally welded under the conditions of a temperature of 150 ° C., a pressure of 0.1 MPa, and a pressurization time of 1 second, The peel strength according to the 180 degree peel test at a moving speed of 200 mm / min can be set to 2 to 7 N / 15 mm. When the peel strength at the weak seal portion is weak, the lid material is easily separated from the sheet-like container, and a gap is likely to be generated between the two. On the other hand, when the peel strength at the weak seal portion is increased, the average peel strength of the lid member is increased, and it may be difficult to peel off the lid member. By setting the peel strength at the weak seal portion to 2 to 7 N / 15 mm, it is possible to maintain the state where the sheet-like container and the lid material are bonded for a long period of time while allowing the lid material to be peeled off. it can.

  The area ratio of the weak seal portion in the seal layer can be set to 20 to 95%, for example. When the area ratio of the weak seal portion in the seal layer is increased, the lid material is easily separated from the sheet-like container, and a gap is easily generated. On the other hand, when the area ratio of the weak seal portion in the seal layer is small, the average peel strength of the lid member increases, and it may be difficult to peel off the lid member.

  Therefore, by setting the area ratio of the weak seal portion in the seal layer to 20 to 95%, it is possible to peel off the cover material, while maintaining the state where the sheet-like container and the cover material are bonded for a long period of time. Can be maintained. From the viewpoint of maintaining the state where the sheet-like container and the lid material are bonded for a longer period, the area ratio of the weak seal portion in the seal layer is preferably 20 to 70%, and preferably 25 to 65%. It is more preferable to set it as 30 to 60%.

  The shape, number, and arrangement of the weak seal portions can take various forms as in the case of the strong seal portions described above.

  As a method of making the peel strength of the weak seal portion weaker than that of the strong seal portion, for example, it is possible to adopt a method in which an adhesive having a peel strength weaker than that of the adhesive placed on the strong seal portion is adopted in the weak seal portion. it can. In this case, the adhesive for the strong seal portion and the adhesive for the weak seal portion may be separately arranged, or after the adhesive for the strong seal portion is applied, the adhesive for the weak seal portion is applied on the adhesive. May be laminated.

  The seal layer includes an adhesive layer disposed on both the strong seal portion and the weak seal portion, and an adhesion inhibitor layer disposed on the adhesive layer of the weak seal portion. The inhibitor layer may contain a resin different from the resin contained in the adhesive layer. By making the resin contained in the adhesion inhibitor layer a resin different from the adhesive layer, the peel strength at the weak seal portion can be made weaker than the peel strength at the strong seal portion.

  In this case, in the PTP manufacturing process, a sealing layer having a strong seal portion and a weak seal portion can be provided by a simple operation of laminating each of the above layers on the lid.

  The resin contained in the adhesion inhibitor layer may be different from the resin contained in the adhesive layer. For example, when a vinyl chloride adhesive or vinyl acetate adhesive is used for the adhesive layer, the polyolefin resin, nitrified cotton resin, polyamide resin, chlorinated rubber resin, acrylic melamine are used as the adhesion inhibitor layer. Inks containing resins such as epoxy resins, epoxy melamine resins, and urethane resins can be employed. These inks may be used alone or in combination of two or more.

  In addition, for example, when a polyolefin-based adhesive is used for the adhesive layer, as the adhesion inhibitor layer, vinyl chloride resin, nitrified cotton resin, polyamide resin, chlorinated rubber resin, acrylic melamine resin, epoxy An ink containing a resin such as a melamine resin or a urethane resin can be used. These inks may be used alone or in combination of two or more.

  Between the lid material and the seal layer, information on the packaged items such as the white colored layer, the colored layer, the character print layer, the pattern print layer, etc. within the range in which the functions of the strong seal portion and the weak seal portion described above are not impaired. Layers for protection, such as the above-described white colored layer, such as a layer for display, an anchor coat layer, and an overcoat layer may be provided.

  The press-through package has an easy peel direction in which the lid can be easily peeled compared to other directions, and the strong seal portion and the weak seal portion are extended along the easy peel direction. Also good. In this case, when the lid member is peeled off, the weak seal portion is peeled off from the sheet-like case before the strong seal portion. As a result, the peeling direction of the lid material can be guided so that the lid material is peeled along the easy peel direction, that is, the extending direction of the weak seal portion.

Example 1
An example of the PTP will be described with reference to the drawings. As shown in FIG.1 and FIG.2, PTP1 is arrange | positioned on the sheet-like container 2 provided with the some pocket part 21 in which the to-be-packaged object 5 is accommodated, and the sheet-like container 2, and the plurality of pocket parts 21 are provided. It has the lid | cover material 4 which covers the opening surface 211, and the sealing layer 3 which interposes between the sheet-like container 2 and the lid | cover material 4, and adhere | attaches both. As shown in FIGS. 1 and 3, the seal layer 3 includes a strong seal portion 31 and a weak seal portion 32 having a peel strength lower than that of the strong seal portion 31.

  As shown in FIG. 1, the PTP 1 of this example has a substantially rectangular shape in a plan view as viewed from the stacking direction. Similar to general PTP, the PTP 1 is configured so that the package 5 can be pushed out of the pocket portion 21 while the lid member 4 is broken by pushing the pocket portion 21. As shown in FIG. 4, the PTP 1 is also configured so that the lid 4 can be peeled off from the sheet-like container 2 and a plurality of packages 5 can be taken out from the pocket portion 21 at once.

  The sheet-like container 2 of this example is made of polyvinyl chloride and has a thickness of 250 μm. As shown in FIG. 3, the sheet-like container 2 is bonded to the lid member 4 via the seal layer 3.

  The lid member 4 of this example is an aluminum foil 41 having a thickness of 20 μm made of a hard material of 1N30. The mat surface 411 of the aluminum foil 41 is bonded to the seal layer 3 as shown in FIGS. As shown in FIG. 3, an ink layer 42 and an overcoat layer 43 are sequentially laminated on the bright surface 412 of the aluminum foil 41. For convenience, the description of the ink layer 42 and the overcoat layer 43 in FIG. 2 is omitted.

  Specifically, the ink layer 42 can be configured as a layer for displaying information on the package 5 such as a white colored layer, a colored layer, a character print layer, and a pattern print layer. Further, the ink layer 42 may have a multilayer structure by repeating application and drying of ink as necessary.

  The ink used for the ink layer 42 is vinyl chloride resin, vinyl acetate resin, polyolefin resin, nitrified cotton resin, polyamide resin, chlorinated rubber resin, acrylic melamine resin, epoxy melamine resin, urethane resin. An ink containing a resin such as can be used. The ink layer 42 of this example is made of an ink containing a vinyl chloride-vinyl acetate copolymer resin.

  Specifically, the overcoat layer 43 has a function of protecting the ink layer 42, that is, a layer for displaying information related to the package 5 such as a white colored layer. As the coating agent constituting the overcoat layer 43, a coating agent having a relatively high heat resistance, such as a nitrified cotton coating agent, an epoxy coating agent, and an acrylic coating agent, can be used. The overcoat layer 43 of this example is composed of a coating agent containing a nitrified cotton melamine butyral resin.

  As shown in FIG. 3, a seal layer 3 including a strong seal portion 31 and a weak seal portion 32 is interposed between the sheet-like container 2 and the lid member 4. As shown in FIG. 1, the strong seal part 31 is arrange | positioned over the perimeter of the peripheral part of PTP1. Further, on the inner side of the peripheral edge portion of the PTP 1, the strong seal portions 31 and the weak seal portions 32 are alternately arranged in the width direction of the PTP 1, that is, the direction orthogonal to the longitudinal direction.

  As shown in FIG. 3, the seal layer 3 includes an adhesive layer 33 disposed on both the strong seal portion 31 and the weak seal portion 32, and an adhesion inhibitor disposed on the adhesive layer 33 of the weak seal portion 32. Layer 34. The adhesion inhibitor layer 34 includes a resin different from the resin included in the adhesive layer 33.

  The adhesion inhibitor layer 34 of this example is laminated on a part of the mat surface 411 of the aluminum foil 41 and is made of ink containing maleic acid-modified polypropylene. The adhesive layer 33 covers both the mat surface 411 and the adhesion inhibitor layer 34 and is adhered to the sheet-like container 2. The adhesive layer 33 includes a vinyl chloride-vinyl acetate copolymer and a polyester resin, and is made of an adhesive that can be thermally welded.

  As shown in FIG. 4, when the lid 4 of this example is peeled off from the sheet-like container 2, in the strong seal portion 31, the lid 4 is at the interface between the adhesive layer 33 and the aluminum foil 41. Separate from 2. In the weak seal portion 32, the lid member 4 is separated from the sheet-like container 2 at the interface between the adhesive layer 33 and the adhesion inhibitor layer 34.

  More specifically, as shown in FIG. 3, in the strong seal portion 31, the aluminum foil 41 of the lid member 4 and the sheet-like container 2 are directly bonded by the adhesive layer 33. Therefore, in the PTP 1 stacking direction, the strong seal portion 31 has two interfaces, that is, an interface between the sheet-like container 2 and the adhesive layer 33 and an interface between the adhesive layer 33 and the aluminum foil 41. .

  And when the adhesive agent containing a vinyl chloride-vinyl acetate copolymer and a polyester resin is employ | adopted for the adhesive bond layer 33 like this example, peeling between the sheet-like container 2 and the adhesive bond layer 33 is carried out. The peel strength between the adhesive layer 33 and the aluminum foil 41 is smaller than the strength. Therefore, when the lid 4 is peeled off from the sheet-like container 2, the lid 4 is separated from the sheet-like container 2 at the interface between the adhesive layer 33 and the aluminum foil 41 in the strong seal portion 31 (see FIG. 4). ).

  As shown in FIG. 3, in the weak seal portion 32, an adhesive layer 33, an adhesion inhibitor layer 34, and an aluminum foil 41 are sequentially laminated on the sheet-like container 2. Therefore, in the stacking direction of PTP 1, the weak seal portion 32 has an interface between the sheet-like container 2 and the adhesive layer 33, an interface between the adhesive layer 33 and the adhesion inhibitor layer 34, and an adhesion inhibitor layer 34. There are three interfaces, the interface with the aluminum foil 41.

  When the adhesive layer 33 and the adhesion inhibitor layer 34 are combined in this example, the peel strength at the interface between the adhesive layer 33 and the adhesion inhibitor layer 34 is the weakest among the three interfaces. Become. Therefore, when the lid 4 is peeled off from the sheet-like container 2, the lid 4 is separated from the sheet-like container 2 at the interface between the adhesive layer 33 and the adhesion inhibitor layer 34 in the weak seal portion 32 (FIG. 4).

PTP1 of this example can be manufactured by the following method, for example. First, an ink containing a vinyl chloride-vinyl acetate resin is applied to the bright surface 412 of the aluminum foil 41 prepared in advance. The amount of ink applied can be appropriately set within a range of 0.1 to 10 g / m ² , for example. The ink is dried using a drying oven to form an ink layer 42 on the bright surface 412.

Next, a coating agent is applied on the ink layer 42. The coating amount of the coating agent can be appropriately set in the range of 0.1 to 10 g / m ^2. The coating agent is dried using a drying oven to form an overcoat layer 43 on the ink layer 42.

Thereafter, an ink containing maleic acid-modified polypropylene is applied to a part of the mat surface 411 of the aluminum foil 41. The coating amount of the ink can be appropriately set in a range of 0.1 to 10 g / m ^2. The ink is dried using a drying oven to form an adhesion inhibitor layer 34 on a part of the mat surface 411.

Next, an adhesive containing a vinyl chloride-vinyl acetate copolymer and a polyester resin is applied onto the mat surface 411, and the mat surface 411 and the adhesion inhibitor layer 34 are covered with the adhesive. The application amount of the adhesive can be appropriately set within a range of 1 to 10 g / m ² , for example. Thereafter, the adhesive is dried using a drying oven to form the adhesive layer 33.

  As described above, the sealing layer 3 including the adhesive layer 33 and the adhesion inhibitor layer 34 can be formed on the lid member 4. Thereafter, a separately prepared sheet-like container 2 is bonded to the seal layer 3 by heat welding. Thus, PTP1 can be obtained.

  Next, the function and effect of this example will be described. The PTP 1 includes a sheet-like container 2 and a lid member 4 bonded to the sheet-like container 2 via a seal layer 3. Further, the seal layer 3 includes a strong seal portion 31 and a weak seal portion 32 in which the peel strength of the lid member 4 from the sheet-like container 2 is weaker than the strong seal portion 31.

  Therefore, the average peel strength of the lid material 4 in the PTP 1, that is, the peel strength corresponding to the ease of peeling when the user pulls the lid material 4 from the sheet-like container 2 and takes out the package 5, This is an intermediate value between the peel strength at the strong seal portion 31 and the peel strength at the weak seal portion 32. Thereby, the peeling strength in the strong seal | sticker part 31 can be strengthened compared with the conventional PTP1 provided with the cover material 4 which can peel, enabling the operation | work which peels off the cover material 4 from the sheet-like container 2. FIG. .

  Then, by providing the strong seal portion 31 in a part of the seal layer 3, the state in which the lid member 4 and the sheet-like container 2 are bonded to each other in the strong seal portion 31 can be maintained for a long period of time. Therefore, the PTP 1 can suppress the natural separation of the lid member 4 from the sheet-like container 2 over a long period of time.

  Further, for example, when the lid 4 is naturally separated from the sheet-like container 2 for some reason in the weak seal portion 32, a gap may be formed between the lid 4 and the sheet-like container 2. However, even in this case, since the lid member 4 and the sheet-like container 2 are bonded to each other in the strong seal portion 31, it is possible to prevent the gap between the lid member 4 and the sheet-like container 2 from further spreading.

  As a result, the PTP 1 can suppress the natural separation of the lid 4 from the sheet container 2 while enabling the lid 4 to be peeled off from the sheet container 2. Further, even when a part of the lid member 4 is naturally separated for some reason, it is possible to suppress the expansion of the gap between the lid member 4 and the sheet-like container 2. As a result, the pocket portion 21 can be prevented from communicating with the external space, and the quality of the packaged item 5 can be maintained over a long period of time.

  In addition, the seal layer 3 of this example includes an adhesive layer 33 disposed on both the strong seal portion 31 and the weak seal portion 32, and an adhesion inhibitor layer 34 disposed on the adhesive layer 33 of the weak seal portion 32. And have. The adhesion inhibitor layer 34 includes a resin different from the resin included in the adhesive layer 33. Thereby, the peel strength in the weak seal portion 32 can be made weaker than the peel strength in the strong seal portion 31. Further, in the manufacturing process of PTP 1, the sealing layer 3 including the strong seal portion 31 and the weak seal portion 32 is obtained by a simple operation of sequentially laminating the adhesion inhibitor layer 34 and the adhesive layer 33 on the lid member 4. Can be provided.

  The strong seal part 31 of this example is arrange | positioned over the perimeter of the peripheral part of PTP1. As a result, all the pocket portions 21 in the PTP 1 are surrounded by the strong seal portion 31. Therefore, when the cover material 4 is naturally separated from the sheet-like container 2 for some reason in the weak seal portion 32, the sheet-like container 2 and the cover material 4 are formed in the strong seal portion 31 disposed around the pocket portion 21. The bonded state can be maintained. As a result, the pocket portion 21 can be more effectively suppressed from communicating with the external space, and the quality of the packaged object can be maintained for a longer period.

  In PTP 1, when the lid member 4 is peeled off from the sheet-like container 2, the weak seal portion 32 is peeled off from the sheet-like container 2 before the strong seal portion 31. Since the strong seal portion 31 and the weak seal portion 32 of this example extend in the longitudinal direction of the PTP 1 inside the peripheral portion of the PTP 1, the lid 4 is PTP 1 that is the extending direction of the weak seal portion 32. It peels along the longitudinal direction. Thus, in the PTP of this example, the longitudinal direction is the easy peel direction, and the direction in which the lid member 4 is peeled off can be guided so that the lid member 4 is peeled along the longitudinal direction.

(Example 2)
This example is an example of the PTP 102 having the lid member 402 in which the aluminum foil 41 and the support film 45 are laminated. Of the reference numerals used in and after the present embodiment, the same reference numerals as those used in the above-described embodiments represent the same constituent elements as those in the above-described embodiments unless otherwise specified.

  As shown in FIG. 5, the lid member 402 of this example includes an aluminum foil 41 laminated on the seal layer 3 and a support film 45 made of resin and provided on the aluminum foil 41. Between the support film 45 and the aluminum foil 41, an ink layer 42 laminated on the aluminum foil 41 and a laminate layer 44 interposed between the ink layer 42 and the support film 45 are provided.

  The aluminum foil 41 in this example is made of a hard material of 1N30 and has a thickness of 20 μm. The ink layer 42 of this example is made of an ink containing a vinyl chloride-vinyl acetate copolymer resin. The laminate layer 44 is composed of an adhesive for dry lamination containing a polyester-polyurethane resin. The support film 45 is made of polyethylene terephthalate and has a thickness of 3.5 μm. Others are the same as in the first embodiment.

  The PTP 102 of this example can be manufactured, for example, by the following method. First, an ink containing a vinyl chloride-vinyl acetate resin is applied to the bright surface 412 of the aluminum foil 41 prepared in advance, and the ink is dried. The ink layer 42 is formed by drying in an oven.

Next, an adhesive for dry lamination including a polyester-polyurethane resin is applied on the ink layer 42 to form a laminate layer 44. The application amount of the adhesive can be appropriately set within a range of 1 to 10 g / m ² , for example.

  Next, the support film 45 is bonded onto the laminate layer 44 by a dry laminating method.

  Thereafter, similarly to Example 1, the PTP 102 can be obtained by sequentially laminating the sealing layer 3 and the sheet-like container 2 on the mat surface 411 of the aluminum foil 41.

  The lid member 402 of this example includes an aluminum foil 41 laminated on the seal layer 3 and a support film 45 made of resin and provided on the aluminum foil 41. Therefore, the tensile strength of the lid member 402 can be further increased as compared with the case where the support film 45 is not provided. Therefore, in the operation of peeling off the lid member 402 from the sheet-like container 2, it is possible to more surely prevent the lid member 402 from being broken.

  Further, the PTP 102 can increase the piercing strength of the lid member 402 as compared with the case where the support film 45 is not provided. Therefore, the child resistance function, that is, the function of preventing the infant from pushing the article 5 from the pocket portion 21 by mistake can be given to the PTP 102. In addition, the PTP 102 of this example has the same effects as those of the first embodiment.

Example 3
This example is an example of the PTP 103 in which the resin contained in the adhesion inhibitor layer 343 is changed. The PTP 103 of this example has the same configuration as that of Example 2 except that an ink containing vinyl chloride-amino resin is used for the adhesion inhibitor layer 343.

  When the lid member 402 is peeled from the sheet-like container 2 in the PTP 103 of this example, the lid member 402 is sealed at the interface between the adhesive layer 33 and the aluminum foil 41 in the strong seal portion 31 as in the second embodiment. Separate from layer 3 (see FIG. 6).

  On the other hand, the weak seal portion 32 includes an interface between the sheet-like container 2 and the adhesive layer 33, an interface between the adhesive layer 33 and the adhesion inhibitor layer 343, and an interface between the adhesion inhibitor layer 343 and the aluminum foil 41. There are three interfaces.

  When the adhesive layer 33 and the adhesion inhibitor layer 343 are combined in this example, the peel strength at the interface between the adhesion inhibitor layer 343 and the aluminum foil 41 is the weakest among the above three interfaces. . Therefore, when the cover material 402 is peeled off from the sheet-like container 2, the cover material 402 is separated from the seal layer 3 at the interface between the adhesion inhibitor layer 343 and the aluminum foil 41 in the weak seal portion 32 (see FIG. 6). ).

  In the PTP 103 of this example, the peel strength between the aluminum foil 41 of the lid member 402 and the adhesion inhibitor layer 343 is smaller than the peel strength between the adhesion inhibitor layer 343 and the adhesive layer 33. Therefore, when the lid member 402 is peeled off, the lid member 402 is separated from the sheet-like container 2 at the interface between the adhesion inhibitor layer 343 and the aluminum foil 41, and the adhesion inhibitor layer 343 adheres to the sheet-like container 2. . Also in this case, the same effects as those of the second embodiment can be achieved.

(Reference Example 1)
In this example, a test material simulating the PTP cover material was prepared, and the peel strength and puncture strength of the cover material from the sheet-like container were measured. The configuration and production method of the test material produced in this example will be described below.

・ Test material A1
The test material A1 is a test material for simulating a strong seal portion in the PTP1 of Example 1. In preparing the test material A1, first, an aluminum foil made of a hard material of 1N30 and having a thickness of 20 μm was prepared. An ink containing vinyl chloride-vinyl acetate resin was applied to the bright surface of the aluminum foil. The amount of ink applied was 1 g / m ² . Thereafter, the ink was dried using a drying oven to form an ink layer on the bright surface.

Next, a coating agent containing nitrified cotton melamine butyral resin was applied on the ink layer. The coating amount of the coating agent was 1.5 g / m ² . Thereafter, the coating agent was dried using a drying oven to form an overcoat layer on the ink layer.

Next, an adhesive containing a vinyl chloride-vinyl acetate copolymer and a polyester resin was applied onto the mat surface of the aluminum foil. The application amount of this adhesive was 3.5 g / m ² .

  Thereafter, the adhesive was dried in a drying oven to form an adhesive layer on the mat surface. Thus, a test material A1 was obtained.

・ Test material A2
The test material A2 is a test material for simulating the weak seal portion in the PTP 1 of Example 1. In producing the test material A2, an ink layer and an overcoat layer were laminated on the bright surface of the aluminum foil by the same procedure as the test material A1.

Next, an ink containing maleic acid-modified polypropylene was applied onto the mat surface of the aluminum foil. The amount of ink applied was 1 g / m ² . The ink was dried using a drying oven to form an adhesion inhibitor layer on the mat surface.

Next, an adhesive containing a vinyl chloride-vinyl acetate copolymer and a polyester resin was applied on the adhesion inhibitor layer. The application amount of this adhesive was 3.5 g / m ² . Then, the adhesive bond layer was formed on the adhesion inhibitor layer by drying the adhesive using a drying oven. Thus, a test material A2 was obtained.

・ Test material B1
The test material B1 is a test material for simulating a strong seal portion in the PTP 102 of the second embodiment. In producing the test material B1, first, an aluminum foil made of a hard material of 1N30 and having a thickness of 20 μm was prepared. A vinyl chloride-vinyl acetate resin ink was applied to the bright surface of the aluminum foil. The amount of ink applied was 1 g / m ² . Thereafter, the ink was dried using a drying oven to form an ink layer on the bright surface.

Next, an adhesive for dry lamination containing a polyester-polyurethane resin was applied on the ink layer to form a laminate layer. The application amount of this adhesive was 3.5 g / m ² .

  Subsequently, the support film was bonded together on the laminate layer by the dry lamination method. The support film of this example is made of polyethylene terephthalate (“Lumirror (registered trademark) F-51” manufactured by Toray Industries, Inc.) and has a thickness of 3.5 μm.

  Then, the adhesive bond layer was laminated | stacked on the mat | matte surface of aluminum foil by the procedure similar to test material A1. Thus, a test material B1 was obtained.

・ Test material B2
The test material B2 is a test material for simulating the weak seal portion in the PTP 102 of the second embodiment. In producing the test material B2, a pattern printing layer, a laminate layer and a support film were sequentially laminated on the bright surface of the aluminum foil by the same procedure as the test material B1.

  Thereafter, an adhesion inhibitor layer and an adhesive layer were sequentially laminated on the mat surface of the aluminum foil by the same procedure as that for the test material A2. Thus, test material B2 was obtained.

・ Test material C1
The test material C1 is a test material for simulating a strong seal portion in the PTP 103 of Example 3. The method for producing the test material C1 is the same as that for the test material B1.

・ Test material C2
The test material C2 is a test material for simulating the weak seal portion in the PTP 103 of the third embodiment. The preparation method of the test material C2 is the same as that of the test material B2, except that the ink applied on the mat surface is changed to an ink containing a vinyl chloride-amino resin.

  Using the specimen obtained as described above, the peel strength and puncture strength from the sheet-like container were measured.

-Peel strength Each test material was adhere | attached on the resin sheet of thickness 250micrometer which consists of vinyl chloride (Sumitomo Bakelite Co., Ltd. "VSS-1101") by heat welding. Thermal welding is No. made by Yasuda Seiki Seisakusho Co., Ltd. A 212 YSS heat sealer was used, and the heat welding conditions were a temperature of 150 ° C., a pressure of 0.1 MPa, and a pressurization time of 1 second. And the strip-shaped test piece of width 15mm was extract | collected from the laminated body of the resin sheet and the test material.

  Using a universal testing machine (Autograph (registered trademark) AG-X manufactured by Shimadzu Corporation), the peel strength of the strip-shaped test piece was measured by the following procedure. First, as shown in FIG. 7, both ends 201 (201 a and 201 b) in the longitudinal direction of the resin sheet 200 of the strip-shaped test piece 100 were fixed to the jig 61. The test material 400 was peeled off from one end 201 a in the longitudinal direction of the strip-shaped test piece 100 and fixed to the chuck 62. Then, the chuck 62 was moved in a direction parallel to the longitudinal direction, and the test material 400 was peeled off so that the peeling angle was 180 ° (arrow 621). The moving speed of the chuck 62 was 200 mm / min.

  While moving the chuck 62, the load applied to the chuck 62 was measured by a load cell, and the average value of the load was defined as the peel strength (N / 15 mm) of the test material 400 from the resin sheet 200. The above measurement was performed five times for each test material 400. Table 1 shows average values of peel strengths obtained by five measurements.

-Puncture strength Using a rheometer (CR-200D / CR-150 manufactured by Sun Chemical Co., Ltd.), the puncture strength of the test material was measured by the following procedure. First, as shown in FIG. 8, the test material 400 was placed on the lower jig 71 having a hole 711 having an inner diameter of 30 mm. Next, an upper jig 72 having a hole 721 having an inner diameter of 25 mm was placed on the test material 400, and the test material 400 was sandwiched between the upper jig 72 and the lower jig 71. At this time, the positions of both jigs 71 and 72 were adjusted so that the center of the hole 711 of the lower jig 71 and the center of the hole 721 of the upper jig 72 coincided with each other.

  A test tool 73 having a hemispherical tip 731 having a diameter of 1 mm was inserted into the hole 721 of the upper jig 72, and the test tool 73 was pushed in until the test material 400 was broken (arrow 732). The moving speed of the test tool was 50 mm / min. The load applied to the test tool 73 was measured with the load cell until the test material 400 broke, and the maximum value of the load in each measurement was defined as the piercing strength (N). The above measurement was performed five times for each test material 400. Table 1 shows an average value of the piercing strength obtained by five measurements.

  As shown in Table 1, the test materials A1, B1, and C1 in which the adhesive layer and the aluminum foil are directly bonded are the test materials in which the adhesion inhibitor layer is interposed between the adhesive layer and the aluminum foil. The peel strength was stronger than A2, B2, and C2. From these results, in PTP1, 102, and 103 of Examples 1 to 3, the portion where the adhesion inhibitor layers 34 and 343 are provided becomes the weak seal portion 32, and the portion that does not have the adhesion inhibitor layers 34 and 343 is present. It can be understood that the strong seal portion 31 is obtained.

  In addition, the test materials B1, B2, C1, and C2 provided with the support film had higher piercing strength than the test materials A1 and A2 that did not have the support film. Furthermore, the piercing strength of the test materials B1, B2, C1, and C2 was 3.0 to 5.0N. Therefore, it can be understood that the PTPs 102 and 103 of Examples 2 and 3 including the support film 45 have a child resistance function.

(Reference Example 2)
In this example, an aluminum foil having a thickness shown in Table 2 was used to prepare a test material that simulates the PTP cover material, and the piercing strength of the cover material was measured. The test materials D1, E1, and F1 produced in this example have the same configuration as the test material A1 except that an aluminum foil having the thickness shown in Table 2 was used. Further, the test materials D2, E2, and F2 have the same configuration as the test material A2 except that an aluminum foil having the thickness shown in Table 2 was used.

  For these test materials, the piercing strength was measured in the same manner as in Reference Example 1. The puncture strength of each test material was as shown in Table 2.

  As shown in Table 2, the test materials D1, D2, E1, E2, F1, and F2 used a thicker aluminum foil than the test materials A1 and A2, and therefore the piercing strength compared to the test materials A1 and A2. Became stronger. Furthermore, the piercing strength of the test materials D1, D2, E1, E2, F1, and F2 was 3.0 to 5.0N. From these results, it can be understood that the child resistance function can be imparted to the PTP by increasing the thickness of the aluminum foil.

  The PTP according to the present invention is not limited to the embodiments and reference examples described above, and the configuration can be appropriately changed within a range not impairing the gist thereof. For example, in the first to third embodiments, an example of the seal layer 3 in which the strong seal portion 31 and the weak seal portion 32 are arranged in a striped shape and the peeling direction of the lid member 4 is guided in the longitudinal direction of the PTP 1 is shown. However, the arrangement of the strong seal portion 31 and the weak seal portion 32 is not limited to this.

  For example, as shown in FIG. 9, the strong seal portion 31 and the weak seal portion 32 may be extended in a direction inclined with respect to the longitudinal direction of the PTP 1. In this case, the extending direction of the strong seal portion 31 and the weak seal portion 32 becomes the easy peel direction, and the peeling direction of the lid member 4 can be guided in the easy peel direction.

  The seal layer 3 is, for example, a mode in which a number of weak seal portions 32 having a circular shape are arranged at equal intervals (see FIG. 10), or a mode in which the weak seal portions 32 are arranged in a grid (see FIG. 11). The periphery of the pocket portion 21 may be a strong seal portion 31 and the outer side of the strong seal portion 31 may be a weak seal portion 32 (see FIG. 12). Moreover, the sealing layer 3 is good also as an aspect by which the weak seal part 32 which exhibits circular at one edge part in the longitudinal direction of PTP1, as shown in FIG. Moreover, the sealing layer 3 can also be made into the aspect by which the strong seal | sticker part 31 which exhibits a cyclic | annular form around the pocket part 21 as shown in FIG.

  The sheet container 2 in the PTP 1 may be provided with a dividing line 22 for dividing the sheet container 2 into small pieces. The dividing line 22 may be, for example, a perforation formed through the sheet-like container 2 or a notch that is inserted in the thickness direction of the sheet-like container 2. When the sheet-like container 2 has the dividing line 22, for example, as shown in FIG. 15, the strong seal portion 31 may be arranged so as to overlap the dividing line 22, or as shown in FIG. The weak seal portion 32 may be disposed so as to overlap the line 22, and the strong seal portion 31 may be disposed on both sides of the weak seal portion 32.

  When the dividing line 22 is a perforation, the shape of the strong seal portion 31 on the dividing line 22 can be a shape other than a straight line. For example, as shown in FIG. 17, the strong seal portion 31 on the dividing line 22 has a width in the vicinity of the pocket portion 21 and becomes narrower as the distance from the pocket portion 21 decreases. It may have a different width depending on the position.

  Moreover, the strong seal | sticker part 31 may be arrange | positioned over the perimeter of the outer peripheral part of PTP1, as shown, for example in FIG.17 and FIG.18. When the sheet-like container 2 has the dividing line 22, the strong sealing portion 31 is arranged on the dividing line 22 or on both sides of the dividing line 22 and also on the entire circumference of the outer peripheral edge of the PTP 1, so that In each small piece of the PTP 1, the strong seal portion 31 can be disposed on the entire outer periphery of the pocket portion 21. As a result, even after the PTP 1 is divided into small pieces, the adhesion between the sheet-like container 2 and the lid member 4 can be maintained.

  Further, as shown in FIGS. 19 and 20, it is also possible to arrange the weak seal portion 32 on the dividing line 22a at the center in the longitudinal direction of the PTP 1 and arrange the strong seal portion 31 on the other dividing line 22b. .

  9, 10, 12, and 13 to 20, in the one or more pocket portions 21, the strong seal portions 31 are arranged around each pocket portion 21 over the entire circumference. Has been. Therefore, it can suppress more effectively that the said pocket part 21 communicates with external space, and can maintain the quality of a to-be-packaged object over a long period of time.

  Furthermore, it is also possible to change the strong seal portion 31 and the weak seal portion 32 in the embodiments shown in the first to third embodiments and FIGS. 9 to 13 described above.

DESCRIPTION OF SYMBOLS 1,102,103 Press-through package 2 Sheet-like container 21 Pocket part 211 Opening surface 3 Seal layer 31 Strong seal part 32 Weak seal part 4 Lid material

Claims (6)

A sheet-like container having a plurality of pockets in which an article to be packaged is stored;
A lid that is disposed on the sheet-like container and covers the opening surfaces of the plurality of pocket portions;
Intervening between the sheet-like container and the lid, and having a seal layer to adhere both,
The said seal layer is a press-through package which has a strong seal part and a weak seal part with weak peeling strength of the said cover material from the said sheet-like container compared with the said strong seal part.   The press-through package according to claim 1, wherein the strong seal portion is disposed around the periphery of the pocket portion.   The seal layer has an adhesive layer disposed on both the strong seal portion and the weak seal portion, and an adhesion inhibitor layer disposed on the adhesive layer of the weak seal portion, The press-through package according to claim 1 or 2, wherein the adhesion inhibitor layer contains a resin different from the resin contained in the adhesive layer.   The said lid | cover material has an aluminum foil laminated | stacked on the said sealing layer, and consists of resin, and has the support film provided on the said aluminum foil, The any one of Claims 1-3. Press-through package.   The lid member has a piercing strength of 3.0 to 5.0 N when a test tool having a hemispherical tip having a diameter of 1.0 mm is pushed in at a speed of 50 mm / min. Item 5. The press-through package according to any one of Items 1 to 4.   The press-through package has an easy peel direction in which the lid material can be easily peeled compared to other directions, and the strong seal portion and the weak seal portion are along the easy peel direction. The press-through package according to claim 1, wherein the press-through package is extended.

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