JPH066017Y2 - Aseptic packaging with openable lid - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a pack-type packaging container that mainly stores foods such as meat, seafood, vegetables and fruits, confectionery, and particularly, the container part and the lid part. The present invention relates to an aseptic packaging container capable of opening and closing the lid part by integrally molding and a semi-permanently maintaining aseptic state in the packaging container.

[Prior Art] There has been a conventional processing method for forming a pack type packaging container by integrally molding a container part and a lid part by a compressed air vacuum molding method using a synthetic resin film or sheet, and these molding methods are used. The processed lid opening / closing type packaging container has already been commercialized, and various containers for packaging fresh food have been developed.

For example, as shown in FIG. 5, the hinge portion 18 connecting the container body 12 and the lid body 13 is formed in a semicircular shape, and the bent portions formed on both sides of the hinge portion 18 are bent. 16, 16 ', 1
Since the shape and position of 9 and the shape of the bent portions 15 and 20 on the peripheral side of the container body 12 and the lid body 13 are formed substantially at right angles, when the lid body 13 is closed to the container body 12, The lid 13 is 180
The hinge portion 18 is circularly rotated by a degree.

[Problems to be solved by the device]

However, in the packaging container shown in FIG. 5, when folded, the folded portions 16 and 16 'of the container body 12 and the folded portion 19 of the lid 13 cannot be overlapped in a close contact state, and the hinge portion 18 Not only became slightly elliptical, but a gap was formed in the jointed portion, and it was not possible to completely adhere them. Further, since the position of the container edge piece 14 and the position of the lid edge piece 21 are formed horizontally, when the hinge portion 18 is bent and both edge pieces 14 and 21 are overlapped, the lid body 13 is formed. Since the edge surface of the hinge portion 18 on the side contacts the edge surface corner (corner portion of the bent portion 16 ') of the hinge portion 18 on the container body 12 side, the container edge piece 14 and the edge lid piece 21 are completely sealed. It will be impossible. Therefore, a gap is generated between the peripheral surfaces of the container body 12 and the lid body 13, and the lid body 13 cannot be completely and reliably closed. As a result, dust and moisture easily enter through this gap, which is unsanitary and impairs the appearance of the container, and in order to eliminate this gap, both edge pieces 14 and 21 are forcedly closed with a stapler or the like.

Therefore, the present invention has been made in view of the above conventional problems, that is, by changing the structure of the connecting portion of the container body and the lid and the positions of the peripheral surfaces of the container body and the lid, the container is closed. It is an object of the present invention to provide a lid part openable type aseptic packaging container capable of hermetically sealing the closed edge surfaces of the main body and the lid body in a complete and reliable state, and semipermanently maintaining the container inner surface in a sterile state.

[Means for Solving the Problems]

The lid opening / closing type aseptic packaging container of the present invention was developed to solve the above-mentioned problems, and one of the container body 2 and the lid body 3 is formed by a method of molding an antibacterial material by compressed air vacuum. The container body 2 and the lid body 3 are connected to each other by providing the bent portions 6 and 9 which are fitted to each other on the side portions and the hinge portion 8 between the bent portions 6 and 9. A lid opening / closing type aseptic packaging container integrally formed with folding portions 5 and 10 which are fitted to each other on the remaining side portions of the container body 2 and the lid body 3, wherein the folding portion 5 is provided. 10 and 10 are provided with a container edge piece 4 and a lid edge piece 11 which have stepped portions H and H'on the periphery thereof, respectively, and the container edge piece 4 is provided between the hinge portion 8 and the bent portion 6. And the antibacterial material is mainly composed of thermoplastic resin 25 'and antibacterial zeolite 26. A multilayer sheet obtained by fusing or adhering at least one thermoplastic resin sheet 28 to a sheet 27 containing the antibacterial zeolite 26 in the range of 0.1 to 5% by weight based on the total weight of the thermoplastic resin 25 '. 29, and the antibacterial material is mainly composed of a foaming resin 25 ″, an antibacterial zeolite 26, a foaming agent and a nucleating agent 30, and the above-mentioned content is based on the total weight of the foaming resin 25 ″. Antibacterial zeolite 26
The foam 31 may be in the range of 0.1 to 5% by weight, the blowing agent in the range of 5 to 15% by weight, and the nucleating agent 30 in the range of 0.1 to 5% by weight.

[Action]

According to the above configuration, when covering the container body 2 with the lid body 3, the bending angle of the hinge portion 8 is reduced by the amount of the step, so that the bending load on the hinge portion 8 is reduced by that amount, and the bending load of the hinge portion 8 is reduced. Since the container edge piece 4 and the lid edge piece 11 can be easily overlapped with each other, a gap is unlikely to occur in that portion, and the taper portion 7 on the container body 4 side abuts the bent portion 9 on the lid body 3 side so that the gap is formed. Less likely to occur. Further, the microorganisms attached to the sheet 27 containing the antibacterial zeolite 26 of the multilayer sheet 29 forming the container body 2 and the lid 3 are killed by the ions having the bactericidal action in the antibacterial zeolite 26, and The surface is made aseptic, and the thermoplastic resin sheet 28 provides strong support when packaging food.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

1 to 4 show an aseptic packaging container with a lid opening and closing according to the present invention. Reference numeral 1 denotes a lid opening / closing type aseptic packaging container. As shown in FIG. 1, the lid opening / closing type aseptic packaging container 1 comprises a container body 2 and a lid body 3 by a compressed air vacuum forming method using a film-shaped antibacterial material. A packaging container with a lid formed by integrally molding and, and this molding method is conventional. Hereinafter, the features of the lid opening / closing type aseptic packaging container of the present invention will be described in detail. As shown in FIG. 2, the features of the present invention are as follows.
It is in the structure of the hinge portion 8 which is the connecting portion of the container body 2 and the lid body 3, and in the structure of the container edge piece 4 and the lid edge piece 11. First, the hinge portion 8 which is the first characteristic is formed in a semicircular shape, and the bent portion 6 and the taper portion 7 each having an L-shaped cross section are formed on both sides of the hinge portion 8, that is, the peripheral edge portion on the container body 2 side. Is formed, and a bent portion 9 having an L-shaped cross section is formed in the peripheral edge portion on the one hand lid 3 side, and the peripheral edge surface of the lid body 3 is formed such that the tip portion thereof has a trapezoidal cross section. Are linked to. In this case, the bent portions 6 and 9 are arranged such that the lid body 3 is located at an upper position, and the taper portion 7 is arranged along the tip surface of the hinge portion 8 in the container body 2. Is configured to be inclined upward in the peripheral surface of the. Next, regarding the positions of the container edge piece 4 and the lid edge piece 11 which are the second feature, as is apparent from FIG. 2, the bent portion 5 of the container body 2 is formed in an inverted L-shaped cross section. Thus, the upper surface serves as the container edge piece 4. Further, the one lid edge piece 11 is configured such that the bent portion 10 of the lid body 3 is formed in a trapezoidal cross section and the lid edge piece 11 is formed on the lower surface. Therefore, the container edge piece 4
Is formed in the upper part by the step H of the bent part 5, whereas the lid edge piece 11 is formed in the lower part by the step H'of the bent part 10. That is, when the container edge piece 4 and the lid edge piece 11 are overlapped with each other, the lid edge piece 11 is overlapped with the container edge piece 4 by H ′ (the step length is the same as H and H ′) in the upper part. Will be done. As a result, the bending angle of the hinge portion 8 is 18
The angle is less than 0 degree.

In this way, the tapered portion 7 is provided on the peripheral surface of the container body 2 and the steps H and H'are provided on the container edge piece 4 and the lid edge piece 11, which is shown in FIGS. 3 and 4. As described above, the hinge 8 can be smoothly bent, and the peripheral surface of the hinge 8 and the peripheral surface of the container can be closed in a completely sealed state when the lid is closed.

It should be noted that this working configuration will be more clear if the conventional structural view shown in FIG. 5 and the structural view of the present invention shown in FIG. 2 are compared.

Next, referring to FIG. 6 and FIG. 7, the material characteristics of the lid opening / closing type aseptic packaging container according to the present invention will be described.

As shown in FIG. 6, the antibacterial material used in the lid-opening and closing type aseptic packaging container 1 of the present invention is mainly composed of a thermoplastic resin 25 'and an antibacterial zeolite 26.
A sheet 2 having an antibacterial zeolite 26 in the range of 0.1 to 5% by weight with respect to the total weight of 25 'and having a thickness of 0.03 mm to 0.1 mm
7 is a multilayer sheet 29 in which at least one thermoplastic resin sheet 28 is fused or adhered. This multilayer sheet 29
The sheet 27 containing the antibacterial zeolite 26 is placed inside and molded into the aseptic packaging container 1 with a lid opening and closing in a desired shape. The reason why the multilayer sheet 29 is used in this way is to impart an antibacterial property to the inner surface of the lid-opening and closing type aseptic packaging container 1, and to reduce the amount of the antibacterial zeolite 26 used to reduce the cost.

This thermoplastic resin 25 'can be mixed with the antibacterial zeolite, the properties required as a packaging container for foods, for example, capable of withstanding a certain low temperature and high temperature and having heat retention, Any material may be used as long as it has a certain degree of rigidity, does not give off odor to food, and is water resistant and non-toxic. For example, polystyrene, polyethylene, polypropylene, ABS resin and the like.

As shown in FIG. 7, the antibacterial material used for the lid opening and closing type aseptic packaging container 1 is mainly composed of a foaming resin 25 ″, an antibacterial zeolite 26, a foaming agent and a nucleating agent 30, Antibacterial zeolite for the total weight of foaming resin 25 ″
26 to 0.1-5 wt%, blowing agent 5-15 wt% and nucleating agent 30
In the range of 0.1 to 5% by weight and formed on the foam 31. The foam 31 is particularly excellent in cold insulation and is lightweight. As the foamable resin 25 ″, for example, polystyrene, polyethylene and ABS resin are used.
Freon 12, butane, propane, pentane and the like are used as the foaming agent, and talc, calcium carbonate, clay and the like are used as the nucleating agent 30.

The method and results of the antibacterial activity test of Escherichia coli, Staphylococcus aureus, Salmonella, and Vibrio parahaemolyticus of the lid-opening and closing aseptic packaging container 1 of the present invention are as follows.

1) Test strain Escherichia coli IFO 3301 (Escherichia coli) Staphylococcus aureus ATCC 6538P (Staphylococcus aureus) Salmonella typhimurium (Laboratory isolate) (Salmonella) Vibrio parahaemolyticus IFO 12711 (Vibrio parahaemolyticus) 2) Culture medium E. coli, yellow grape Coccus, Salmonella for normal agar medium with 0.2% meat extract For Vibrio parahaemolyticus 3% salt-containing normal agar medium with 0.2% meat extract 3) Preparation of bacterial solution E. coli, Staphylococcus aureus, Salmonella; with normal broth medium After culturing overnight at 37 ° C., it was prepared with sterile physiological saline so that the number of bacteria was 10 ^{4 to 5} per ml.

Vibrio parahaemolyticus: After culturing in a normal broth medium containing 3% sodium chloride at 37 ° C. overnight, it was prepared using sterile 3% saline so that the number of bacteria was 10 ^{4 to 5} per ml.

4) Test operation Test piece of Example (4.8 cm x 4.8 cm) after washing with ethanol
A fixed amount of the bacterial solution was sprayed on one side of the test piece (4.8 cm x 4.8 cm) of the comparative example and stored at 37 ° C. After the start of storage 0 (immediately after spraying), 24 and 48 hours later, the surviving bacteria on the test piece were washed out with SCDLP liquid medium (Daigo Nutrition Chemistry). (37 ° C
The number of surviving cells was measured for 2 days) and converted into the number of viable cells per one test piece. In addition, after dispensing the same amount of the bacterial solution sprayed on the test piece into a Petri dish, store it at 37 ° C, and immediately afterwards,
The number of viable bacteria after 24 and 48 hours was measured and used as a target.

Example 1 Polystyrene (PS) with antibacterial raw zeolite 1.
A sample piece is made by adding and mixing 0% by weight.

Comparative Example 1 A sample piece is made of polystyrene (PS) only.

Table 1 shows the test results.

Example 2 A sample piece is prepared by mixing 1% by weight of antibacterial zeolite with high density polyethylene (HDPE).

Comparative Example 2 A test piece is made only from high density polyethylene (HDPE).

The test results are shown in Appendix-2.

Example 3 A test piece is prepared by adding 0.7% by weight of antibacterial zeolite to low density polyethylene (LDPE).

Comparative Example 3 A test piece is made only from low density polyethylene (LDPE).

The test results are shown in Appendix-3.

Example 4 A test piece is prepared by adding 1% by weight of antibacterial zeolite to polypropylene (PP) and mixing them.

Comparative Example 4 A sample piece is made of polypropylene (PP) only.

The test results are shown in Appendix-4.

Example 5 A test piece is prepared by adding 0.7% by weight of antibacterial zeolite to polypropylene (PP).

Comparative Example 5 A test piece is made of polypropylene (PP) only.

The test results are shown in Appendix-5.

[Advantages of the Invention] With the configuration of the present invention as described above, it is possible to eliminate the gap that has conventionally been generated between the container portion and the lid portion when the lid is closed, and dust from this gap portion can be eliminated. It is possible to completely and surely prevent invasion of moisture and moisture.

Further, since the packaging container of the present invention is made of antibacterial zeolite, the inner surface of the container can be kept completely sterile.

[Brief description of drawings]

The drawings show an embodiment of the present invention and are shown in FIGS.
FIG. 1 is a perspective view and a sectional view of a lid-opening and closing type aseptic packaging container of the present invention, FIG. 5 is a sectional view of a conventional packaging container, and FIGS.
FIG. 1 is a partially enlarged sectional view of an antibacterial material of a lid opening / closing type aseptic packaging container according to the present invention. 1 ... Aseptic packaging container with openable / closable lid 2, 12 ... Container body 3,13 ... Lid body 4, 14 ... Container edge piece 5, 6, 9, 10, 15, 16, 16 ', 19, 20 …… Bent part 7 …… Tapered part, 8,18 …… Hinge part 11,21 …… Lid edge piece 25 ′ …… Thermoplastic resin 25 ″ …… Foamable resin 26 …… Antibacterial zeolite 27 …… Sheet 28 …… Thermoplastic resin sheet 29 …… Multilayer sheet, 30 …… Nucleating agent 31 …… Foam H, H ′ …… Step

Claims (2)

[Scope of utility model registration request] 1. An antibacterial material is molded by a compressed air vacuum method.
The container body 2 and the lid body 3 are provided with bent portions 6 and 9 which are fitted to each other, and a hinge portion 8 is provided between the bent portions 6 and 9, whereby the container body 2 is provided. The lid opening / closing type in which the lid body 3 and the lid body 3 are connected to each other, and folding parts 5 and 10 that are fitted to each other on the remaining side portions of the container body 2 and the lid body 3 are integrally formed. In the aseptic packaging container, a container edge piece 4 and a lid edge piece 11 each having stepped portions H and H'on the periphery of the bent portions 5 and 10 and overlapping are provided, and the hinge portion 8 and the bent portion are provided. 6 is a taper portion 7 reaching the container edge piece 4, and the antibacterial material is mainly composed of a thermoplastic resin 25 'and an antibacterial zeolite 26,
A multilayer sheet 29 obtained by fusing or adhering at least one thermoplastic resin sheet 28 to a sheet 27 containing 0.1 to 5% by weight of the antibacterial zeolite 26 with respect to the total weight of the thermoplastic resin 25 '. An aseptic packaging container that can be opened and closed with a lid. 2. The antibacterial material mainly comprises a foaming resin 25 ″, an antibacterial zeolite 26, a foaming agent and a nucleating agent 30,
0.1-5% by weight of the antibacterial zeolite 26 and 5-15% by weight of the foaming agent based on the total weight of the foaming resin 25 ".
And a foam 31 containing 0.1 to 5% by weight of the nucleating agent 30.
The aseptic packaging container with a lid opening and closing according to claim (1).