JP2000085839A - Package - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a package at low cost, which is designed so that an unadhering part serving as an unsealing start end between a lid and a container main body is not partly stuck closely, which can easily separate the lid stuck closely to the container main body at the unadhering part from the container main body with fingers or the like, and which can easily form a lug for unsealing the package. SOLUTION: A blister pack comprises a lid 2 and a container main body 3 having rigidity, both of which are sealed to each other at a thermally adhering part 4 of the outer circumference of a contents-storing portion. In this blister pack, an unadhering part which serves as an unsealing start end 5 for the blister pack is provided in at least one place of the above thermally adhering part of the circumference of the blister pack, and a recess 32 depressed to the side of the above contents-storing portion is formed at the unadhering part in the container main body.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a package called a so-called hard blister pack, in which a container body for storing contents such as ham, sausage, and prepared foods has rigidity. The present invention relates to a package capable of easily forming a trigger for opening the package when taking out stored contents from the package.

[0002]

2. Description of the Related Art Conventionally, in a package called a hard blister pack for storing contents such as ham, sausage, and prepared foods, a package is used to facilitate taking out the contents stored in the package. Then, the lid and the container main body are not thermally bonded to the corners of the package and are left unbonded, so that the lid and the container main body can be easily grasped with fingers or the like. A portion which becomes the opening start end is usually formed.

However, the lid and the container body are not bonded to each other without being thermally bonded to each other, so that the lid and the container body can be easily grasped with fingers or the like. The part is in close contact despite being in a non-adhered state, or because the thermal resistance of the thermal adhesive used for the lid and the container body is large,
It was quite troublesome to separate the lid and the container body.

[0004] The reason for this is that the thermal adhesives used for the lid and the container body for thermally bonding the lid and the container body, respectively, are beautifully attractive when purchased as a package. One reason is that a material with low-temperature sealing properties is usually used so as to give an appearance,
As another reason, a package called a blister pack is manufactured by a machine generally called a deep drawing vacuum packaging machine. This machine is usually configured to be able to be manufactured with multiple impositions, heat molding of the container body, supply of contents, vacuum
Operations such as thermal bonding between the lid and the container body and trimming into individual packages can be performed as a series of operations. As a result, the cut surfaces of the lid and the container body are in close contact with each other at the non-adhered portion when trimmed into individual packages.

As a method of solving this problem, a method of printing a release agent on the portion which becomes the opening start end has been adopted. According to this method, since the release agent is printed on the portion to be the opening start end, the lid and the container body at the portion to be the opening start end can be easily separated from each other. Can be easily formed. The portion serving as the opening start end is usually provided at a corner portion because the dead space of the package can be generally utilized and the lid and the container body are most easily grasped with fingers or the like. Each of them has a beautiful pattern printed thereon, and the position of the beautiful pattern printing and the opening start end are naturally determined. Therefore, the release agent provided at the opening start end portion is provided on the thermal adhesive surface of the lid, and it is necessary to print the release agent on the thermal adhesive surface at the same time as the pattern printing while registering the printing register. is there. For that purpose, it is necessary to use a laminate in which a substrate to be subjected to pattern printing and a thermal adhesive are bonded in advance, and when performing only pattern printing using only the substrate,
Considering the yield during printing, the cost must be high.

[0006]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention has been made in view of the above problems, and an object of the present invention is to prevent an unadhered portion between a lid serving as an opening start end and a container body from being partially adhered. At the same time, the lid and the container body, which are in close contact with each other at the non-adhered portion, can be easily separated by a finger or the like, and a trigger for opening the package can be easily formed. To provide

[0007]

Means for Solving the Problems In order to achieve the above object, the present inventors have set forth a package according to the first aspect of the present invention, in which a lid and a rigid container body are provided on the outer periphery of a content storage portion. In a blister pack in which a portion is sealed with a heat-bonded portion, at least one unbonded portion serving as an opening start end of the blister pack is provided in the heat-bonded portion on a peripheral portion of the blister pack, and the container of the unbonded portion is provided. The main body is formed with a concave portion depressed toward the content storage section. With this configuration, it is possible to prevent the lid and the container body from coming into close contact with each other at least in the portion where the concave portion is provided, in the non-adhesive portion serving as the opening start end, and to prevent the non-adhesive portion from contacting the non-adhesive portion. By pressing the lid at a position corresponding to the concave portion provided in the container main body into the concave portion provided in the container main body with a finger or the like, the lid and the container main body that are in close contact with each other can be easily separated. The trigger for opening the package can be easily formed.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The above-mentioned present invention will be described in detail below. First, the lid used for the package of the present invention will be described. The lid is usually provided with a beautiful print and is used in a deep drawing vacuum packaging machine, so that it has high mechanical strength and excellent dimensional stability, and also has excellent physical and chemical properties. It is configured to include at least a base material and a thermal adhesive for thermally bonding to the container body to form a sealed package. As the substrate, for example, a sheet made of a resin such as polyester, polyamide, polypropylene, polycarbonate, polyacetal,
Alternatively, a sheet or the like formed from a film of polyvinyl alcohol, saponified ethylene-vinyl acetate copolymer, or the like can be used. This sheet may be unstretched, but is preferably stretched in a uniaxial or biaxial direction. In addition, cellophane, synthetic paper, and the like can be used as other base materials. The thickness of the base material may be a thickness capable of holding the strength and rigidity of the base material of the lid body to the minimum necessary, and is generally about 12 to 30 μm. Depending on other required qualities such as properties, the sheet or cellophane has a barrier property by forming a polyvinylidene chloride layer or an evaporated layer of an inorganic substance such as aluminum, silicon oxide, aluminum oxide, indium oxide, tin oxide, zirconium oxide. The configuration may be used, or a laminate obtained by appropriately combining these components may be used as the base material.

The thermal adhesive may be a copolymer of at least one of polyolefins such as polyethylene, polypropylene, polybutene, polybutadiene and polyisoprene or at least two of olefins such as ethylene, propylene, butene, butadiene and isoprene. Or one of ionomer, ethylene-vinyl acetate copolymer, ethylene-acrylic acid copolymer, ethylene-methyl acrylate copolymer, ethylene-ethyl acrylate copolymer, ethylene-methacrylic acid copolymer, etc. Alternatively, a mixture of two or more of these resins can be used, and a sheet in which these resins are formed into a film can be used.

[0010] In the lid of the present invention, an intermediate material may be provided between the base material and the thermal bonding material, if necessary. It is provided, for example, when the material alone cannot sufficiently fulfill the required quality as a lid of the package. As the required quality, gas barrier properties, mechanical toughness, bending resistance, puncture resistance,
There are various properties such as impact resistance, abrasion resistance, cold resistance, chemical resistance and the like, and these required qualities are achieved by providing an intermediate material. Examples of the intermediate material include metal foils such as aluminum, iron, copper, and tin, or polyolefins such as polyethylene terephthalate, polyamide, polyethylene, and polypropylene, polyvinyl chloride, polycarbonate, polyvinyl alcohol, and ethylene-propylene copolymers. Films such as saponified ethylene-vinyl acetate copolymers, or those provided with a polyvinylidene chloride layer or an inorganic, silicon oxide, aluminum oxide, indium oxide, tin oxide, zirconium oxide or other inorganic vapor-deposited layer, or And films such as polyvinylidene chloride. Further, one or more of the above-mentioned intermediate materials may be used in combination.

The lid used for the package of the present invention is attached to the base material, the thermal adhesive, or, if necessary, the intermediate material by a known dry lamination method, a T-die extrusion method or the like. It can be obtained by combining them. In the case where the T-die extrusion method is used, an anchor coat agent can be applied to a sheet on the side to be extruded in advance as needed to improve the adhesiveness.

Next, the container body used in the package of the present invention will be described. The container main body has rigidity, and at least the container main body has a rigidity imparting material for imparting rigidity to the container main body, and a heat bonding for heat sealing with the lid to form a sealed package. And at least a material. Further, since this container body is usually manufactured by heat-forming a sheet with a deep drawing vacuum packaging machine, the rigidity imparting material also needs to be a heat-formable material.

The stiffness imparting material may be, for example, a sheet made of a resin such as polyester, polystyrene, polycarbonate, polyacetal, or polyvinyl chloride, or a polyvinylidene chloride layer or aluminum, silicon oxide, aluminum oxide on these sheets. , An indium oxide, a tin oxide, a zirconium oxide or the like, or a layer obtained by appropriately combining one or more of them.

Further, as the thermal adhesive used for the container body, the same thermal adhesive as that described for the lid can be used, and therefore the description is omitted, but in the package of the present invention, the thermal adhesive is not used. It is preferable that the heat bonding portion with the container main body has a configuration having easy peelability. With this configuration, the lid and the container body at the opening start end can be easily gripped with the fingers and the like, and the lid and the container body gripped with the fingers and the like are in opposite directions. , The lid and the container body can be peeled off, and the contents can be taken out. In order to obtain a heat-bonding portion having easy peelability, a combination of a heat-bonding material used for the lid and a heat-bonding material used for the container body may be considered. For example, polyethylene and ethylene-vinyl acetate copolymer Or ionomer, or a combination of cohesion and peeling type such as polyethylene and ethylene-propylene copolymer, or polypropylene and ethylene-propylene copolymer. Also,
If the thermal adhesive used for the lid (or the thermal adhesive used for the container body) is one layer of a co-extruded article co-extruded with another resin, the container body (or lid) The same thermal adhesive as that of the co-extruded product is used, and the thermal adhesive having an easy peeling property is peeled between the thermal adhesive layer of the co-extruded product and another resin layer. Parts (usually a combination called a delamination type).

Further, in the container body of the present invention, a reinforcing material may be provided as necessary in addition to the rigidity-imparting material and the thermal adhesive, and the reinforcing material is usually provided with the rigidity-imparting material and the heat-imparting material. It is provided, for example, when the required quality as the container body of the package cannot be sufficiently achieved by the adhesive alone.
The required quality includes various properties such as gas barrier properties, mechanical toughness, bending resistance, puncture resistance, impact resistance, abrasion resistance, cold resistance, and chemical resistance. This is achieved by providing a material. Examples of the reinforcing material include films such as polyester, polyamide, polyolefin such as polyethylene and polypropylene, polyvinyl chloride, polycarbonate, polyvinyl alcohol, ethylene-propylene copolymer, saponified ethylene-vinyl acetate copolymer, and the like, or Examples thereof include a polyvinylidene chloride layer or a layer provided with a vapor-deposited layer of an inorganic substance such as aluminum, silicon oxide, aluminum oxide, indium oxide, tin oxide, and zirconium oxide, or a film of polyvinylidene chloride or the like. Further, one or more of the above-mentioned reinforcing materials may be used in combination.

Further, the container body used in the package of the present invention may be formed by using the rigidity-imparting material, the heat-adhesive material, or, if necessary, the reinforcing material by a known dry lamination method, a T-die extrusion method, or a co-extrusion method. It can be obtained by laminating appropriately using a method or the like. In the case of using the T-die extrusion method or the co-extrusion method,
An adhesive layer may be provided between the stiffness-imparting material, the heat-adhesive material, and the reinforcing material to improve the adhesiveness as needed.

Next, a more detailed description will be given with reference to an embodiment shown in the drawings. FIG. 1 is a perspective view of a first embodiment of a package according to the present invention, FIG. 2 is a perspective view of a main part showing a state of the package of FIG. 1 during an opening operation, and FIG. 3 is a perspective view of the package according to the present invention. It is a principal part perspective view of 2nd Embodiment, 1 in a figure is a package,
Reference numeral 2 denotes a lid, 3 denotes a container body, 4 denotes a heat bonding portion, 5 denotes an opening start end, 31 denotes a storage portion, and 32 and 33 denote concave portions, respectively.

FIG. 1 is a perspective view of a first embodiment of the package of the present invention. As shown in FIG.
Comprises a lid body 2, a storage part 31 for storing contents, and a container body 3 drawn and formed to have a triangular prism-shaped concave part 32 at one corner, and the lid body 2 and the container body 3
Are thermally bonded by a thermal bonding portion 4 formed around the outer peripheral edge of the storage portion 31 except for a corner portion having the concave portion 32.

When the lid 2 and the container body 3 are not thermally bonded but in an unbonded state, the corner having the concave portion 32 becomes the opening start end 5 of the package 1 of the present invention. is there.
At the opening start end 5 as well, the lid 2 and the container body 3 are in close contact with each other except at the portion where the recess 32 is formed. Even if the operation of separating the body 2 and the container body 3 is performed, it is quite difficult to separate them (this method is a conventional operation method at the opening start end). However, in the package 1 of the present invention, the opening 2 is the opening start end 5 in which the concave portion 32 is formed at the corner, and the lid 2 corresponding to the concave portion 32 is pushed into the concave portion 32 by a finger or the like. As shown in FIG. 2, the lid 2 naturally rises up from the container body 3 so that the lid 2 and the container body 3
Can be separated from each other, so that the opening start end originally intended can be used.

In the first embodiment, the triangular prism-shaped concave portion 32 is formed in the container body 3 at the opening start end 5. However, the concave portion formed in the package 1 of the present invention is the same as the first embodiment. The lid is not limited to the shape, and the lid can be pushed into the concave portion by a finger or the like, for example, a cylindrical shape, a hemispherical shape, a rectangular parallelepiped shape, a rectangular shape, or the like, depending on a position where the opening start end is provided or a space at the opening start end. It can take any shape. In addition, the formation of the concave portion is for storing the contents by forming a concave portion of a desired shape in a molding die used for molding the storage portion for storing the contents of the deep drawing vacuum packaging machine. Can be formed at the same time when the storage section is formed, so that the cost of the package is lower than that of a conventional package in which a release agent is printed on the lid.

The shape of the concave portion can take various shapes as described above. However, in the various shapes described above, for example, as shown in a concave portion 33 shown in FIG.
The concave portion having a shape configured to be continuously deeper toward 31 is a shape that follows the natural action of the user during the opening operation, and is a more preferable shape.

[0022]

As described above, the package of the present invention prevents the non-adhered portion between the lid, which is the opening start end, and the container body from partially adhering to each other. The lid and the container body are brought into close contact with each other, and the lid is removed from the container body by performing an operation of pushing the lid at a position corresponding to the concave portion formed in the container main body into the concave portion with a finger or the like. The package can be easily separated, and the opening of the package can be easily formed. Further, the package of the present invention also has an effect that it can be manufactured at a lower cost than a conventional package manufactured by a method of printing a release agent on a portion serving as an opening start end.

[Brief description of the drawings]

FIG. 1 is a perspective view of a first embodiment of a package according to the present invention.

FIG. 2 is a perspective view of a main part showing a state during an opening operation of the package of FIG. 1;

FIG. 3 is a perspective view of a main part of a second embodiment of the package according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Packaging body 2 Lid 3 Container main body 4 Thermal bonding part 5 Opening start end 31 Storage part 32, 33 Recess

Continued on the front page F term (reference) 3E067 AA11 AB05 AB06 AC03 BA02A BB01A BB04A BB09A BB11A BB14A BB15A BB16A BB18A BB25A BC06A BC07A CA04 CA16 CA24 EA06 EA11 EA32 EB01 EB01 EB01 EB01 EB01 EB02

Claims (1)

[Claims] 1. A blister pack in which a lid and a rigid container main body are hermetically sealed at the outer peripheral portion of a content storage portion with a thermal bonding portion, and the blister pack is opened at the thermal bonding portion at a peripheral portion of the blister pack. A package body, wherein at least one unbonded portion serving as a start end is provided, and a concave portion depressed toward the content storage portion side is formed in the container body of the unbonded portion.