JP5949152B2 - Blister package - Google Patents

Description

  The present invention relates to a blister package comprising a soft non-rigid container body and a lid for storing a plurality of sliced pieces or a plurality of stick-like foods, etc. The present invention relates to a blister package that can be peeled off from a container body and opened and has a simple resealing function.

  2. Description of the Related Art Conventionally, blister packs for storing contents such as ham, sausage, bacon or the like that are sliced or stick-like foods are widely used. This blister package is a lid and a flexible container body sealed so as to be peeled off at the peripheral heat bonding part, and the container body is vacuum formed or vacuum / pressure formed to form a content storage part, After storing the contents inside, when covering the lid and thermally bonding the peripheral part and sealing it with the peripheral thermal adhesive part, without forming the thermal adhesive part at the corner that becomes the peeling start part, In addition to the thermal bonding part, the region corresponding to one or both of the lid body and the container main body is a concavo-convex forming part, which makes it easy to grip the edge of the lid body and the container main body, The adhesive part can be peeled off and easily opened (see, for example, Patent Document 1).

  The technology disclosed in Patent Document 1 is a technology that makes it easy to grasp the edges of the lid and the container body to facilitate opening, and can be evaluated in terms of ease of opening. If you use (use up) at once, no problem will occur, but if you keep the remaining contents without using up, there is no reseal function and appropriate sealing such as cellophane tape or rubber band There is a problem that the lid and the container main body are temporarily fixed using a material, or transferred to another container and stored in an appropriate storage place such as a refrigerator.

  As a technique for solving the above-described problems of Patent Document 1, a blister package having a reseal function is known (for example, see Patent Documents 2 and 3). All of these are configured to have a pressure-sensitive adhesive layer (pressure-sensitive adhesive or heat-sensitive adhesive), so that the contents remaining without being used up after opening are re-attached to the lid and container body via the pressure-sensitive adhesive. It is a technique that can be sealed and can be evaluated in that it has a reseal function.

  However, the techniques disclosed in Patent Documents 2 and 3 are provided with a pressure-sensitive adhesive layer on the lid body in Patent Document 2 and on both the lid body and the container body in Patent Document 3 from the meaning of providing a reseal function. It is necessary to add an additional cost, and the adhesive layer is exposed to the contents after opening. It cannot be denied that it also includes problems that are said to be.

JP 2002-205769 A U.S. Pat. No. 3,454,210 JP 2004-026246 A

  Therefore, the present invention provides an inexpensive blister package that can be easily removed from the container body by opening the lid body and opening the contents, and the contents remaining after the removal can be easily resealed. Is to provide.

  In order to achieve the above-mentioned object, the inventor of the present invention described in claim 1 includes a cover body and a container body having a flange portion on the four peripheral edges on which the contents storage portion is formed. In a rectangular blister package sealed in a peelable manner at the edge thermal bonding portion, at least one corner of the four peripheral edges is a peeling start portion where the edge thermal bonding portion is not formed, and the one corner , In the region of the edge thermal bonding portion connecting any one of the two corners adjacent to the one corner, and in the vicinity of each of the corners, away from each corner A re-sealing cut line having a convex shape is formed through the lid and the container body.

  Moreover, this invention of Claim 2 is a blister package of Claim 1, In the unbonded area | region where the said cutting line for resealing was formed in the island shape in the area | region of the said edge thermal bonding part It is characterized by being formed.

  Moreover, this invention of Claim 3 is a blister package in any one of Claims 1, 2. WHEREIN: The said reseal cutting line is substantially L-shaped, It is characterized by the above-mentioned.

  Moreover, this invention of Claim 4 is a blister package in any one of Claim 1, 2. WHEREIN: The said cutting line for resealing is a circular arc shape, It is characterized by the above-mentioned.

In the present invention, the lid and the container body can be heat-bonded and sealed so that they can be peeled off at the edge thermal bonding portions at the four peripheral edges of the flange portion, and when the contents are taken out, the peeling is provided at one corner. The lid is peeled off from the start part and opened, and the contents stored in the contents storage part can be easily taken out, and the contents remaining after taking out are:
1) Fold both corners of the lid to the container body side with the re-sealing cut line formed on the lid to reveal a convex piece consisting of a convex outline formed by the re-sealing cut line In addition, it can be easily resealed by inserting and locking each of the convex pieces to a re-sealing cut line formed on the corresponding container body,
2) With the cutting line for resealing formed on the container body, both corners of the container body are bent to the cover body side so that a convex piece consisting of a convex outline formed by the cutting line appears. The pieces can be easily resealed by inserting and locking the pieces to the resealing cut lines formed on the corresponding lids.

  In addition, the present invention provides a re-sealing technique as shown in the prior art, that is, a deep-drawing vacuum packaging machine for filling and hermetically sealing the contents without having a configuration including an adhesive layer. By incorporating a device for providing a resealing cut line into the unit, the lid body and the container body can be integrally formed, so that the resealing function can be provided at a very low cost.

It is the top view seen from the container main body side of the Example of the blister package concerning this invention. It is a figure which shows the expanded cross section of the XX line in FIG. 1 illustratively. It is a figure explaining resealing after opening of the blister package concerning the present invention. It is a figure which shows the expanded cross section of the YY line in FIG. 3 illustratively. It is the top view seen from the container main body side of the other Example of the blister package concerning this invention.

The present invention will be described in detail below with reference to the drawings.
FIG. 1 is a plan view of a blister package according to an embodiment of the present invention as seen from the container body side, FIG. 2 is a diagram schematically showing an enlarged cross-section along line XX in FIG. 1, and FIG. FIG. 4 is a diagram for explaining re-sealing after opening the blister package, FIG. 4 is a diagram schematically showing an enlarged cross-section of the YY line in FIG. 3, and FIG. 5 is another embodiment of the blister package according to the present invention. It is a top view seen from the container main body side, 1, 1 'in the figure is a blister packaging body, 2 is a drawing forming part, 3 is an edge thermal bonding part, 4 is a peeling start part, 5 is a cut for resealing Lines 5 ′ are convex pieces, 6 is a non-bonded region, 7 is a cut line for suspension, 10 is a lid, and 20 is a container body.

FIG. 1 is a plan view of a blister package according to an embodiment of the present invention as seen from the container body side, and FIG. 2 is a diagram schematically showing an enlarged cross-section along line XX in FIG. Is formed of a lid 10 and a container body 20, and a shallow drawing part 2 is formed in a substantially central part of the container body 20, and the shallow drawing part 2 is sliced into ham, sausage, bacon, or the like, or It is a content storage unit in which content such as stick-shaped food is stored. And the edge thermal bonding part 3 where the whole area | region except the location of the peeling start part 4 formed in one corner | angular part of the said draw- molding part 2 and the blister package 1 was heat-bonded with the said cover body 10 so that peeling was possible. (A region indicated by hatching in FIG. 1) is formed, and one peripheral edge of four peripheral edges connecting one corner where the peeling start portion 4 is formed and a corner on the short side adjacent to this one corner. In the region of the edge thermal bonding portion 3 that forms the edge, the sealing line 5 for resealing that is convex in the direction away from each corner portion is formed in the vicinity of each of the both corner portions and the lid body 10. It is formed through the container body 20. And it can be hung at the edge thermal bonding part 3 in the position which opposes the edge thermal bonding part 3 in which the said cutting line 5 for resealing was formed, and the said drawing forming part 2 at the time of exhibition sale A substantially horseshoe-shaped hanging cut line 7 is formed.

FIG. 3 is a diagram for explaining re-sealing after opening the blister package according to the present invention, and FIG. 4 is a diagram schematically showing an enlarged cross section taken along the line YY in FIG. 3, and the opening shown in FIG. To the extent that the lid 10 and the container main body 20 are peeled off from the start portion 4 and the contents can be taken out as shown in FIG. 3 (on the long side of the rectangular drawn portion 2 in FIG. 3). After opening and taking out a necessary amount, in order to store the remaining contents, both corners of the container body 20 are connected to the lid 10 side by the resealing cut lines 5 formed on the peeled container body 20. A convex piece 5 ′ made of a convex outline formed by the re-sealing cut line 5 is made to appear, and the convex piece 5 ′ is formed on the corresponding lid body 10 respectively. Each of the sealing cut lines 5 is inserted, locked and resealed. Thus, a simple resealing function can be obtained with a simple operation. Although not shown, the method of bending both the corners of the container body 20 to the lid 10 side is not limited to the one-fold bending performed by the above-described resealing cut line 5, but both corners of the container body 20. The convex part 5 ′ may be made to appear by folding the part so as to be wound up to the resealing cut line 5 on the lid 10 side. Since the two corners of the container body 20 can be prevented from coming into contact with the contents by being bent so as to be wound in this manner, it is hygienic.

  As a method of reseal, the side of the container body 20 is bent with a re-sealing cut line 5 to reveal a convex piece 5 ′, and each convex piece 5 ′ is formed on the corresponding lid 10. The method of inserting, locking, and resealing corresponding to each of the resealing cut lines 5 has been described, but the side of the lid 10 is bent by the resealing cut line 5 to form the convex piece 5 ′. The protruding piece 5 'may be inserted, locked, and resealed in correspondence with the resealing cut line 5 formed in the corresponding container body 20, respectively. Needless to say. When the container body 20 side is bent by the resealing cut line 5 to reveal the convex piece 5 ′, or the lid 10 side is bent by the sealing cut line 5 to be convex. In any case where the piece 5 ′ appears, the repulsive force of the bent portion including both corner portions is obtained by bending so that both corner portions to be bent are positioned between the lid body 10 and the container body 20. The convex piece 5 ′ can be reliably inserted into and locked to the resealing cut line 5 and stable resealing can be achieved. If both corners are bent in the opposite direction, it will be difficult to insert and lock the convex piece 5 ′ into the reseal cut line 5 due to the repulsive force of the bent part.

  Moreover, the said cutting line 5 for resealing is not limited to what was illustrated, The shape which becomes convex shape in the direction away from a corner | angular part, specifically, the said cover body 10 and the said container main body 20 When bent with the formed resealing cut line 5, the resealing cut line 5 only needs to have a shape in which a convex piece 5 ′ composed of a convex outline appears. The shape is not limited to an arc shape, and may be substantially L-shaped.

  FIG. 5 is a plan view seen from the container body side of another embodiment of the blister package according to the present invention, and the blister package 1 ′ has the resealing cut line 5 attached to the edge thermal bonding. It is the same as the blister package 1 shown in FIG. 1 except that it is formed in an unbonded region 6 formed in an island shape in the region of the part 3. When the blister packaging body 1 ′ thus configured is peeled from the lid body 10 and the container body 20 from the peeling start portion 4, a reseal cut line 5 is provided in the unbonded region 6. When the peeling reaches the resealing cut line 5, the blister package 1 triggers the resealing cut line 5 from the resealing cut line 5 to the lid. 10 and / or the possibility of tearing of the container body can be eliminated.

  In FIG. 5, the unbonded region 6 has a substantially fan shape. However, the present invention is not limited to this. In short, the resealing cut line 5 only needs to exist in the unbonded region 5. Various shapes can be adopted.

  Next, the said cover body 10 used for the blister package 1 of this invention is demonstrated. Since the lid 10 is usually subjected to beautiful printing and is used in a deep drawing vacuum packaging machine, it has high mechanical strength, excellent dimensional stability, and excellent physical and chemical properties. It has a configuration including at least a base material layer and a heat-adhesive resin layer for forming a sealed package that is thermally bonded to the container body.

  As the base material for forming the base material layer, for example, a sheet made of a polyester-based, polyamide-based, polypropylene-based, polycarbonate-based, or polyacetal-based resin, or polyvinyl alcohol, an ethylene-vinyl alcohol copolymer, or the like is used. A filmed sheet or the like can be used. This sheet may be unstretched, but is preferably stretched in a uniaxial direction or a biaxial direction. In addition, cellophane, synthetic paper, and the like can be used as a substrate other than the above. The thickness of the base material may be any thickness that can be held to the minimum necessary for the strength, rigidity, etc. as the base material of the lid, and about 12 to 30 μm is appropriate. Depending on other required qualities such as protection and design properties, a polyvinylidene chloride layer or an inorganic vapor deposition layer such as aluminum, silicon oxide, aluminum oxide, indium oxide, tin oxide, zirconium oxide may be formed on the sheet or cellophane. It is good also as a structure which has barrier property, and you may use what laminated | stacked combining these things suitably.

  Next, as the thermoplastic resin forming the heat-adhesive resin layer, one or more polyolefins such as polyethylene, polypropylene, polybutene, polybutadiene and polyisoprene or two or more olefins such as ethylene, propylene, butene, butadiene and isoprene are used. Or an ionomer, ethylene-vinyl acetate copolymer, ethylene-acrylic acid copolymer, ethylene-methyl acrylate copolymer, ethylene-ethyl acrylate copolymer, ethylene-methacrylic acid copolymer One type or a mixture of two or more types such as a coalescence can be used, and a sheet obtained by forming these resins into a film can be used.

  In addition, an intermediate layer may be provided between the base material layer and the heat-adhesive resin layer as required, and the intermediate layer is usually a lid only with the base material layer and the heat-adhesive resin layer. This is provided when the required quality cannot be fully achieved. The required quality includes various properties such as gas barrier properties, mechanical toughness, bending resistance, piercing resistance, impact resistance, wear resistance, cold resistance, chemical resistance, etc. This is achieved by providing As the intermediate layer, for example, metal foil such as aluminum, iron, copper, tin, or polyolefin such as polyethylene terephthalate, polyamide, polyethylene, polypropylene, ethylene-propylene copolymer, polyvinyl chloride, polycarbonate, polyvinyl alcohol, Films such as ethylene-vinyl alcohol copolymers, or those provided with a polyvinylidene chloride layer or an inorganic vapor deposition layer such as aluminum, silicon oxide, aluminum oxide, indium oxide, tin oxide or zirconium oxide, or poly Examples of the film include vinylidene chloride. These may be used alone or in combination.

  Further, the lid 10 used for the blister package 1 of the present invention is made of the base material layer, the heat-adhesive resin layer, or the intermediate layer as required by a known dry lamination method, T-die extrusion method or the like. It can be obtained by an appropriate lamination method. Further, in the case of using the T-die extrusion method, an anchor coat layer may be provided at a necessary position as necessary to improve the adhesiveness.

  Next, the said container main body 20 used for the blister package 1 of this invention is demonstrated. Since the container body 20 is usually heat-molded by a deep drawing vacuum packaging machine, it is required to have moldability, and a heat-moldable sheet is used. In general, an unstretched sheet is suitable as this sheet. In addition, this sheet needs to include at least a heat-adhesive resin layer for heat-sealing and sealing with the lid body 10 and is typified by resistance to content to protect the contents. It is usually composed of a content protective layer that satisfies various required qualities such as gas barrier properties, mechanical toughness, flex resistance, puncture resistance, impact resistance, wear resistance, cold resistance, chemical resistance, etc. The

  As the thermoplastic resin forming the thermoadhesive resin layer constituting the container body 20, the same resin as the resin forming the thermoadhesive resin layer described in the lid body 10 can be used, so that the description thereof is omitted. To do.

  Moreover, as a base material which comprises the said content protective layer used for the said container main body 20, polyolefin, such as polyethylene terephthalate, polyamide, polyethylene, a polypropylene, an ethylene-propylene copolymer, polyvinyl alcohol, ethylene-vinyl alcohol copolymer Or a film such as a polyvinylidene chloride layer or an inorganic vapor deposition layer such as aluminum, silicon oxide, aluminum oxide, indium oxide, tin oxide or zirconium oxide, or a film of polyvinylidene chloride. be able to. These may be used alone or in combination.

  Further, the thickness of the thermoadhesive resin layer or the content protective layer used for the container body 20 may be appropriately determined in consideration of the required quality and the drawing ratio required for the container body 20. . Moreover, the said container main body 20 can be obtained by laminating | stacking the said content protective layer and the said thermoadhesive resin layer suitably using a well-known dry lamination method, T-die extrusion method, etc., and as needed It can also be obtained by a well-known coextrusion method.

  By the way, in the blister package 1 of this invention, it is necessary to make the said edge thermal bonding part 3 of the said cover body 10 and the said container main body 20 into an easily peelable structure. By configuring in this way, the lid body 10 and the container body 20 are separated from each other by grasping the lid body 10 and the container body 20 from the opening start portion 4 with fingers or the like and pulling them away from each other. The contents can be easily taken out.

  The edge thermal bonding part 3 having this easy peelability can be obtained by considering a combination of a thermal adhesive resin layer used for the lid body 10 and a thermal adhesive resin layer used for the container body 20. For example, a combination of polyethylene and ethylene-vinyl acetate copolymer or ionomer, polyethylene and ethylene-propylene copolymer, polypropylene and ethylene-propylene copolymer, etc. can be mentioned. A co-extruded product made of the same thermoplastic resin and another resin as the thermoplastic resin forming the thermoadhesive resin layer of the lid body 10 (or the container body 20) is used as the container body 20 (or the lid body). 10), the lid body 10 and the container body 20 are thermally bonded together with thermoplastic resins, and are opened before opening. Edge thermal bonding with easy peelability that peels between layers of a co-extruded product (layer between a thermoplastic resin and another resin) that is a heat-adhesive resin layer of the container body 20 (or the lid body 10). Part 3 may be used.

DESCRIPTION OF SYMBOLS 1,1 'Blister package 2 Drawing forming part 3 Edge thermal bonding part 4 Peeling start part 5 Re-sealing cut line 5' Convex piece 6 Unbonded area 7 Hanging cut line 10 Lid 20 Container body

Claims (4)

  In a rectangular blister package in which a lid and a container main body having flange portions on the four peripheral edges formed with the content storage portions are sealed so as to be peelable by edge thermal bonding portions on the four peripheral edges of the flange portions. One corner of the periphery is a peeling start portion where the edge thermal bonding portion is not formed, and one corner of the one corner and two corners adjacent to the one corner In the region of the edge thermal bonding portion connecting the two, the re-sealing score line that protrudes in the direction away from each corner portion penetrates the lid body and the container body in the vicinity of each of the corner portions. A blister package characterized by being formed.   The blister package according to claim 1, wherein the re-sealing score line is formed in an unbonded region formed in an island shape in the region of the edge thermal bonding portion. Blister packaging according to any of claims 1, wherein the re-closure for score lines is substantially L-shaped. Blister packaging according to any of claims 1, wherein the re-closure for score lines are arcuate.

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