JP5082662B2 - Easy-open blister container - Google Patents

Description

  The present invention relates to an easily openable blister container that can be easily opened by peeling the lid from the container body, and in particular, easily opened from the opening knob provided on one side along the opening cut line. Related to blister containers.

  Conventionally, as a packaging container for enclosing various contents such as foods such as ham and bacon or pharmaceuticals, cosmetics, etc., it is composed of a container body having a recess and a flange part for containing the contents and a lid, and the contents. A blister container is known in which the contents and the flange portion are covered with a lid and the periphery is thermally bonded. When sealing, in order to improve the storage stability of the contents, in addition to the aerated packaging, packaging techniques such as gas-filled packaging in which nitrogen gas or carbon dioxide gas is sealed, oxygen scavenger packaging, or vacuum packaging are generally used. It is used.

  In order to facilitate the opening of these blister containers, the planar shape is generally rectangular, and an unbonded portion between the lid and the container body is formed at one corner to provide an opening knob, from which the lid is opened. It is configured to peel off the body. Furthermore, the surface of the lid and / or the container body that is thermally bonded is subjected to an easy-release treatment. For example, when the lid is subjected to an easy-release treatment, the inner layer of the lid that is thermally bonded to the container body is used. It has a structure in which an easily peelable thermal adhesive resin layer is laminated, picking the opening knob with one finger, picking the container body with the other finger, pulling in the opposite direction, the lid body and the container body peel, It can be opened easily.

  However, there is a problem that the lid and the container main body are in close contact with each other and the opening knob is easily separated from the container main body and is difficult to pick. In particular, in the manufacture of these blister containers, there are many methods in which the container main body and the lid are thermally bonded and then punched into a rectangular shape and trimmed, and the lid is trimmed with the residual heat remaining after thermal bonding. And the trimming part of the container body may cause temporary attachment, making separation of the opening knob more difficult.

  In order to improve the above problem, for example, a tab portion is provided like a milk portion pack, and a thin wire is provided near the outer edge of the peripheral seal portion between the lid and the container body on the container body side of the tab portion and bent. The structure which is easy to cut and tab tabs is used. These are effective when the container body is small, or when the container body is bent and rigid enough to be cut off, but when the container body becomes large like a blister container such as sliced ham or bacon, the container is difficult to pick by hand or A material having a flexible container main body has no rigidity, and such a cutting method is inappropriate.

In addition, a packaging container has been proposed in which a convex portion is provided on at least one of the container main body or the lid member of the non-adhered portion to improve openability (see, for example, Patent Document 1). However, it is not sufficient to prevent the lid and container body from sticking together at the trimming edge. Especially in vacuum packaging, the non-bonded part is also evacuated, and the pressure corresponding to the atmospheric pressure between the container body and the lid material. Is applied, and a certain amount of heat is applied to approach the bonded portion, and the uneven portion once formed is crushed, and the desired easy-opening improvement effect cannot be sufficiently obtained.
JP 2002-302158 A

  Accordingly, the present invention has been made to solve the above-described problems, and can easily pick the lid and easily remove the lid from the container body so that the contents can be taken out. It is to provide an openable blister container.

  In order to achieve the above object, the present invention is characterized in that the present invention according to claim 1 includes a recess having an opening on one side and containing contents, a container body having a flange on the periphery of the recess, A quadrangular shape that covers the opening of the container body and the flange portion and is thermally bonded by a first heat bonding portion provided on the peripheral edge of the flange portion, and a lid body having the same size as the outer edge of the flange portion. The blister container has a top portion between the inner peripheral edge of the first thermal bonding portion on one side and the peripheral edge of the opening portion, and is expanded from the top portion toward the opening portion side and adjacent to one side. A second thermal bonding portion having an oblique seal portion connected to the first thermal bonding portions on the other two sides facing each other is provided on the flange portion, and the lid body and the container body are provided at the second thermal bonding portion. Is heat-bonded so as to be peelable, and the one side of the second heat-bonding portion that faces the top portion of the second heat-bonding portion An unsealed portion is provided in one heat-bonded portion, straddling the top portion, reaching the outer edge of the unsealed portion from the second heat-bonded portion or its vicinity, and forming a cut line that penetrates the lid body, respectively. Opening knobs surrounded by the respective cut lines and the outer edges of the unsealed parts are provided, and the diagonal lines are formed from the end of the cut line of each of the opening knobs on the second heat bonding part side or in the vicinity thereof. An opening cut line extending in two directions along the oblique seal portion and ending without crossing the seal portion or an unsealed portion around the outer edge of the seal portion is provided on the lid, and the opening is opened from the opening knob. It is an easy-open blister container characterized by being opened along the cut line.

  The blister container of the present invention has a cut line that penetrates the lid and is provided with an opening knob, so that the lid and the container main body can be easily separated without being in close contact with the container main body. The picking part can be picked with fingers. An opening cut line is provided on the lid body along the oblique seal portion at the oblique seal portion of the second thermal bonding portion or the unsealed portion around the outer edge thereof, and the lid body and the container body can be peeled off at the second thermal bonding portion. It is thermally bonded and can be easily opened from the opening knob along the opening cut line without changing the container.

The above-described present invention will be described below with reference to the drawings.
1 is a plan view showing a first embodiment of an easily openable blister container according to the present invention, FIG. 2 is a sectional view taken along line XX of FIG. 1, and FIG. 3 is a broken line and a cut in the circle of FIG. FIG. 4 is an enlarged view, and FIG. 4 is a perspective view showing a state in the middle of opening of the easily openable blister container. Reference numeral 1 in the figure denotes an easily openable blister container, 2 denotes a lid, 3 denotes a container body, 4 denotes an opening, 5 is a concave portion, 6 is a flange portion, 7 is a first thermal bonding portion, 8 is a second thermal bonding portion, 8 a is a top portion, 8 b is an oblique sealing portion, 8 aa is a linear sealing portion, 8 ab is a mountain-shaped sealing portion , 9 cut lines 10 opening knob portion 11 is opening for cut line, 12 is cut, 12a linear portion, 12b are shaded area, 12h is the cut tip, 12t rear end of the cut, 13, 16 group Material layer, 14 and 17 are intermediate layers, 15 and 18 are heat-adhesive resin layers, 19 is a tear piece, 121 is one The second cut , 122 is the next (second) cut , L1 is one side, L2 is the side facing one side, M1 and M2 are the other two sides facing each other, and N is the unsealed part .

  The first embodiment of the easy-open blister container of the present invention is as shown in FIGS. A substantially cylindrical recess 5 having an opening 4 on one side and a container body 3 provided with a flange 6 on the periphery of the recess 5, and a flange covering the opening 4 and the flange 6 of the container body 3 The lid 2 having the same size as the outer edge of the portion 6 is a quadrangular easy-open blister container 1 thermally bonded by a first thermal bonding portion 7 provided on the peripheral edge of the flange portion 6. There is a top 8a between the inner peripheral edge of the first thermal bonding portion 7 on one side L1 and the peripheral edge of the opening 4, and it expands from the top 8a toward the opening 4 and is adjacent to one side L1. And an oblique seal portion 8b connected to the first thermal bonding portion 7 of the other two sides M1 and M2 facing each other, and a convex second thermal bonding portion on the first thermal bonding portion 7 side of one side L1 8 is provided on the flange portion 6, and the lid body 2 and the container main body 3 are thermally bonded by the second thermal bonding portion 8 so as to be peelable. Furthermore, the unsealed part N is provided in the 1st heat bonding part 7 of 1 side L1 facing the top part 8a of the 2nd heat bonding part 8, and it straddles the top part 8a and the unsealed part from the 2nd heat bonding part 8 or its vicinity. There are provided opening knobs 10 that are formed with cut lines 9 and 9 that reach the outer edge of N and pass through the lid 2 respectively, and the top portion 8a is surrounded by the cut lines 9 and 9 and the outer edge of the unsealed part N. Yes. The break line 9 may be appropriately provided with a pawl that does not penetrate the lid 2. Furthermore, the opening cut line along the oblique seal portion 8b extends from the end of each of the cut line portions 9 and 9 of the opening knob 10 to the oblique seal portion 8b or the unsealed portion around the outer edge thereof. 11 and 11 are provided on the lid 2. The opening cut line 11 may be provided in the oblique seal portion 8b, but it is preferable to provide it in an unsealed portion around the outer edge of the oblique seal portion 8b in view of the unsealing property. The shape of the concave portion 5 of the container body 3 is not limited to the above shape, and can be various shapes such as a square shape and an elliptical shape.

  The top portion 8a of the second thermal bonding portion 8 has a linear seal portion 8aa having a predetermined length parallel to one side L1, and the linear seal portion 8aa includes one or a plurality of protrusions projecting toward one side L1. The chevron-shaped seal portion 8ab is provided. By adopting such a configuration, when the opening knob 10 is picked and the lid 2 is opened from the container body 3, the tensile force required at the initial stage of opening can be reduced. It can be easily peeled off by pulling, and has the effect of opening smoothly. The number of protruding peaks of the chevron-shaped seal portion 8ab may be one or more depending on the length of the opening knob 10 parallel to one side L1, and if the length becomes longer, It is preferable to provide a number. In addition, although it can open even if it does not provide the mountain-shaped seal | sticker part 8ab, since the opening start can be performed smoothly, providing is preferable. Moreover, without providing the linear seal | sticker part 8aa in the top part 8a, shapes, such as a mountain shape, a round shape, a protrusion shape, may be sufficient, for example, and it is not limited to the shape of description.

Next, the laminated structure of the lid body 2 and the container body 3 that can peel the first thermal bonding portion 7 and the second thermal bonding portion 8 to which the lid body 2 and the container body 3 are thermally bonded will be described. As shown in FIG. 2, the structure of the lid 2 is a chemical protection function (gas barrier property, moisture permeability, etc.) and a physical protection function (tensile strength, impact strength, etc.) required for the contents to be stored. Thus, the base material layer 13 / printing layer (not shown) / intermediate layer 14 / thermoadhesive resin layer 15 or the base material layer 13 / printing layer (not shown) / thermoadhesive resin layer 15 is appropriately designed as a basic configuration. be able to. The base layer 13 is made of a biaxially stretched plastic film such as nylon, polyethylene terephthalate, or polypropylene, a film in which a barrier material such as polyvinyl alcohol or vinylidene chloride is coated on these films, or an inorganic material such as silicon oxide or aluminum oxide. A vapor deposited film is used. Although not shown, the printing layer is provided by gravure printing on the surface of the base material layer 13 facing the intermediate layer 14, for example. For the intermediate layer 14, a barrier film such as ethylene vinyl alcohol, a film on which a metal such as aluminum foil or aluminum is deposited, and a film used for the base material layer 13 are used. For the heat-adhesive resin layer 15, polyethylene, ethylene / vinyl acetate copolymer, ionomer, polypropylene or easily peelable heat-adhesive resin (EPR) or the like is used after film or extrusion lamination. In addition, as a method for imparting easy peelability of EPR, a method of forming a multilayer structure in which a thin layer having a weak adhesive force is provided on the surface, a method of expressing easy peelability by a configuration such as blending a resin having low compatibility, etc. These known ones are appropriately employed. Each of the above layers is laminated by a known technique such as a dry lamination method or an extrusion lamination method to form a laminated material. For example, the following structure is mentioned as a specific laminated structure example of the cover body 2.
(1) OPP / DL / PET / DL / PEF or EVA or ionomer (2) PET / DL / EPR
(3) PET / DL / ON / DL / PEF
(4) OPP / DL / PEF or CPP
(5) ON / DL / PEF
The abbreviations used in the description of the configuration examples are as follows. OPP: biaxially stretched polypropylene film, PET: biaxially stretched polyester film, PEF: polyethylene film, EVA: ethylene / vinyl acetate copolymer, CPP: unstretched polypropylene film, DL: dry laminate adhesive.

  As shown in FIG. 2, the configuration of the container body 3 includes chemical protection functions (gas barrier properties, moisture permeability, etc.) and physical protection functions (tensile strength, impact strength, etc.) required for the contents to be stored. Depending on the moldability, the base layer 16 / intermediate layer 17 / thermoadhesive resin layer 18 or the substrate layer 16 / thermoadhesive resin layer 18 can be appropriately designed as a basic configuration. For the base material layer 16, unstretched plastic films such as nylon, polyethylene terephthalate, polypropylene, polyacrylonitrile, vinyl chloride, and films obtained by coating these films with a barrier material such as polyvinyl alcohol and vinylidene chloride are used. For the intermediate layer 17, a film such as a barrier film such as an ethylene vinyl alcohol copolymer or vinylidene chloride is used. For the heat-adhesive resin layer 15, polyethylene, ethylene / vinyl acetate copolymer, ionomer, polypropylene or easily peelable heat-adhesive resin (EPR) or the like is used after film or extrusion lamination. Each of the above layers is a container material constituting the container body 3 by being laminated by a known technique such as a dry lamination method or an extrusion lamination method. In the container body 3, the base material layer 16 / intermediate layer 17 / thermoadhesive resin layer 18 and the base material layer 16 / thermoadhesive resin layer 18 may be coextruded films, or the base material layer 16 may be a single layer. It is preferable to use EPR for the thermoadhesive resin layers 15 and 18 of the lid 2 and the container body 3 because the easy-opening property is further improved. In this case, the EPR may be used for both the heat-adhesive resin layers 15 and 18 of the lid body 2 and the container body 3, or any one of them may be used.

  The structure of the opening part of the easily openable blister container of this invention is demonstrated in detail using FIG. 1, FIG. FIG. 3 is an enlarged view in the circle of FIG. 1 and shows the structure of the opening portion. The opening cut line 11 provided on the lid body 2 includes intermittent cuts 12, and the cuts 12 extend in a direction parallel to the oblique seal portion 8b and a straight portion 12a in the direction of the opening knob of the straight portion 12a. On the other hand, it consists of a slanted line portion 12b extending obliquely at an obtuse angle with respect to the straight line portion 12a toward the other two sides M1 and M2 facing each other adjacent to one side L1 from the rear end side. The front end 12h is formed so as to be connected to the end portion on the second thermal bonding portion 8 side of the cut line 9 of the opening knob 10 and is opened along the opening cut line 11 from the opening knob 10. Yes. It is preferable that the rear end 12t of the cut 121 of the opening cut line 11 and the tip 12h of the straight portion 12a of the second cut 122 coincide with each other or at least overlap with each other. By doing so, when the opening knob 10 is pulled to open the lid 2, the lid 2 is torn from the rear end 12 t of the first cut 121 and is connected to the second cut 122. The tear 122 guides the tearing direction to the next third break, and can be repeated in the same manner to prevent the tearing line 11 from coming off from the opening break line 11 and becoming unopenable, along the opening break line 11. Can be opened. In addition, as the shape of the cut line 12, a straight line, for example, a bent line such as a character or a hem, a curved line such as a U-character, or a combination of these can be used, but a straight line or a bent line is simple and preferable. . In addition, the code | symbol of the 1st cut | interruption 121 and the 2nd cut | interruption 122 is attached | subjected on description, and the cut | disconnection 12 and a shape and a function are the same.

  Next, a method for manufacturing the lid 2 will be described. First, a printed pattern is back printed on the surface of the base material layer 13 facing the intermediate layer 14 by a gravure printing method. Thereafter, the intermediate layer 14 and the heat-adhesive resin layer 15 are sequentially laminated by the dry lamination method or the extrusion lamination method, and the winding of the lid material is manufactured. Next, while rewinding the winding of the cover material obtained in the punching process, the cut line 9 and the cut line 12 are penetrated to the base material layer 13, the intermediate layer 14, and the thermoadhesive resin layer 15 at predetermined positions according to the printing register. For example, the lid 2 is manufactured by using a rotary die cutter, provided with the opening knob 10 and the opening cut line 11. The printed pattern may be provided on the surface of the intermediate layer 14 facing the base material layer 13 or the surface facing the thermoadhesive resin layer 15.

  Next, the manufacturing method of the easily openable blister container 1 of this invention is demonstrated. The lid body 2 manufactured above and the container material manufactured by the method described above are each cut into a predetermined width and wound, and then manufactured by a molding inline filling machine. First, the container body 3 having the recess 5 and the flange 6 is manufactured by being rewound and thermoformed. Thereafter, after the contents are stored in the recess 5, the lid 2 is rewound and the container body 3 and the lid 2 are aligned so that the container body 3 and the lid 2 are in a predetermined position, and the flange portion 6 and the opening 4 of the container body 3. And the cover 2 and the container body 3 are heat-bonded to be peelable by the first heat bonding part 7 and the second heat bonding part 8 so as to cover the contents, the contents are enclosed, and the easily openable blister container 1 is manufactured. The As the molding method, a thermoforming method such as vacuum molding, pressure molding, vacuum pressure molding or the like can be used. In addition, depending on the preservability required for the contents, packaging techniques such as vacuum packaging, gas-filled packaging in which nitrogen gas, carbon dioxide gas or a mixed gas thereof is enclosed, oxygen scavenger packaging, and aeration packaging may be used in combination. it can. In addition, you may use the container body 3 which was once thermoformed and trimmed in another process. In this case, the container body 3 can be used by injection molding a thermoplastic resin.

  Next, the opening method of the easily openable blister container 1 of this invention is demonstrated using FIG. When the opening knob 10 provided on the lid 2 of the easy-open blister container 1 is picked with fingers and opened upward in the direction of the side L2 opposite to the side L1, one connected to the cut line 9 is connected. When the lid 2 is torn from the rear end 12t of the second cut 121 in the direction of the opening 4 and reaches the second cut 122, the opening direction is guided along the second cut 122, and the same is repeated sequentially. The lid 2 is torn along the opening cut line 11 to form a tear piece 19, and the opening 4 and contents (not shown) appear. When the opening cut line 11 reaches the first thermal bonding portion 7 and the tear piece 19 is further pulled, the tear piece 19 is peeled along the first thermal bonding portion 7 between the lid body 2 and the container body 3. It is removed and the opening 4 is opened, and the contents can be easily taken out. In this way, by providing the opening knob 10 at the center of one side L1 so as to be surrounded by the cut lines 9, 9 penetrating the lid 2 in advance and the outer edge of the unsealed portion N, the conventional corner portion is provided. The provided opening knob is in close contact with the container body, and the opening knob is easily separated from the container body and is difficult to pick. The opening knob 10 can be easily picked and opened. is there.

  Next, the present invention will be described in more detail with reference to the following examples.

[ Example 1 ]
One side of a 12 μm thick biaxially stretched polyethylene terephthalate film (PET) is subjected to predetermined printing with a polyurethane ink by a gravure printing method, and a single side corona with a thickness of 30 μm is applied to the printed surface via a polyester polyol-isocyanate adhesive. A corona-treated surface of the treated EPR film (CMPS013C, manufactured by Tosero Chemical Co., Ltd.) was laminated by a dry lamination method, and cured at 40 ° C. for 2 days to produce a lid material used for the lid.

  An unstretched nylon film (CN) having a thickness of 40 μm and a corona-treated surface of a single-sided corona-treated polypropylene film having a thickness of 50 μm were laminated by a dry lamination method through a polyester polyol-isocyanate adhesive, and 40 ° C. The container material used for a container main body was produced after curing for two days.

  Using the container material described above, a 170 mm × 135 mm rectangular container body having a concave portion having a depth of 15 mm × diameter of 100 mm was formed by vacuum deep drawing. An opening knob having a length (M1 to M2 direction in FIG. 1) of 40 mm × width (L1 to L2 direction in FIG. 1) 20 mm is provided at a predetermined position of the lid member, and a straight portion is 5 mm and a hatched portion is 2.5 mm. In addition, a 135 ° angled cut formed by the straight line portion and the hatched portion is formed at a position where the rear end of the cut and the front end of the next cut coincide with the opening direction, and a lid is prepared by providing the opening cut line. . Then, cover the opening and flange of the container body, and the lid and container body are peeled off by the first and second thermal bonding sections so that the opening knob is located at the center of one side. A flexible soft type easy-open blister container 1 was prepared by heat bonding. In addition, the top part 8a of the 2nd heat bonding part 8 was made into the linear seal part 8aa of about 15 mm, and was made into the 5 mountain-shaped seal part which protruded 2.5 mm in the one side L1 side in this part.

[ Example 2 ]
Through a polyester polyol-isocyanate adhesive, a corona-treated surface of a single-sided corona-treated unstretched polypropylene sheet having a thickness of 250 μm and a corona-treated surface of a single-sided corona-treated EPR film (manufactured by Sumitomo Bakelite Co., Ltd., CEL4541). The container material used for a container main body was produced by laminating by a dry lamination method and curing at 40 ° C. for 2 days. The same lid material as in Example 1 was used as the lid material, and the same easy-open blister container 1 as in Hard Type Example 1 was produced.

[Comparative Example 1]
Using the same container main body as in Example 1 and the same lid material as in Example 1, using the lid body that does not provide the cut line for opening and the cut line for opening on the lid material, the flange portion is A soft type easy-open blister container having the same size as that of Example 1 and thermally bonded so as to be peeled was prepared. In addition, an unbonded portion between the lid and the container main body was formed at one corner portion to provide an opening knob.

Since the easy-open blister containers of Examples 1 and 2 have the opening knob at the center of the side, one end of the container is picked with one finger, and the opening knob is easily picked with the other hand. The container body and the lid body are peeled off at the second heat bonding portion and the first heat bonding portion along the opening cut line, and can be opened without changing the container, and the contents can be easily I was able to take it out. In Comparative Example 1, the lid and the container main body are in close contact with each other, and the opening knob provided at the corner is easily separated from the container main body. It was annoying because it was necessary to change the container many times before peeling and taking out the contents. In this way, since the opening knob of the easily openable blister container of the present invention is provided at the center of the side, at the time of opening, the center of the container can be gripped with one finger, and the opening knob is Since it is formed with a cut line that penetrates the lid, the container can be easily picked with the other hand without the container body and the lid closely contacting each other, and it can be opened smoothly without changing the container. It has the effect of being able to do it.

It is a top view which shows 1st embodiment of the easily openable blister container concerning this invention. It is the XX sectional view taken on the line of FIG. It is an enlarged view which shows the cut line and cut in the circle | round | yen of FIG. It is a perspective view which shows the state in the middle of opening of an easily openable blister container.

1 Easy-openable blister container 2 Lid 3 Container body 4 Opening part 5 Recessed part 6 Flange part 7 First heat bonding part 7a Protruding seal part
8 Second heat bonding part
8a top part 8b slant seal part 8aa linear seal part 8ab chevron seal part 9 cut line 10 picking part for opening
11 Opening line 12 Cutting line 12a Straight line part 12b Diagonal line part 12h Cutting edge 12t Cutting edge rear edge 13, 16 Base material layer 14, 17 Intermediate layer 15, 18 Thermal adhesive resin layer 19 Tear piece
121 First cut 122 Next cut L1 One side L2 One side facing one side M1, M2 Two other sides facing each other N Unsealed part

Claims (1)

A recess having an opening on one side and containing the contents; a container body provided with a flange on the periphery of the recess; and covering the opening and flange of the container body and substantially the same size as the outer edge of the flange In the rectangular blister container thermally bonded by the first thermal bonding portion provided on the peripheral edge of the flange portion, the inner peripheral edge of the first thermal bonding portion on one side and the opening A slant seal part having a top part between the peripheral edge of the part and expanding to the opening part side from the top part and connected to the first two heat-bonding parts opposite to each other adjacent to one side A second thermal bonding portion provided on the flange portion, wherein the lid and the container body are thermally bonded in a peelable manner at the second thermal bonding portion, and are opposed to the top portion of the second thermal bonding portion. An unsealed portion is provided in the first thermal bonding portion on one side, and the second thermal welding is straddled across the top portion. An opening knob is provided in which a cut line that reaches the outer edge of the unsealed portion from the portion or the vicinity thereof and penetrates the lid is formed, and the top portion is surrounded by the cut line and the outer edge of the unsealed portion. From the end on the second thermal bonding part side of each of the cut lines of the opening knob or the vicinity thereof to the oblique seal part or the unsealed part around the outer edge thereof in two directions along the oblique seal part. An easy-open blister container, characterized in that an opening cut line that extends and terminates without crossing each other is provided on the lid, and is opened along the opening cut line from the opening knob.

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