JP6463058B2 - Resealable sealed container - Google Patents

Description

  The present invention relates to a resealable sealed container containing, for example, foods such as butter, jam, and miso and seasonings.

For example, as a container for storing butter, margarine, miso, etc., a container made of a resin molded product by vacuum / pressure molding or injection molding, or a molded product of a composite material combining paper and plastic is generally used. I came. However, since these containers are mainly made of resin, it is difficult to develop a high barrier property like metal containers, and there are certain restrictions on the contents and expiration date.
Moreover, although the container excellent in barrier property has the thing made from glass and earthenware, all have a problem that weight is large and a recycling process is complicated.
Furthermore, in the case of metal containers such as metal cans, the barrier properties and sealing properties are impaired after the lid is opened, so that it is not suitable for applications that contain and store foods that are consumed in relatively small amounts over time. .

In the following Patent Document 1 and Patent Document 2, as a resealable container having a barrier property, a container formed by molding a laminated film having a barrier layer such as an aluminum foil and having a flange portion formed in an opening. A main body, an inner lid (sealing material) made of a laminated film having a barrier layer such as aluminum foil and heat-sealed on the upper surface of the flange portion of the container body, and a flange portion of the container body made of a resin molded product The thing provided with the outer lid | cover (overcap) fitted over to is disclosed.
According to the above container, before opening the inner lid, excellent barrier properties and sealing properties are obtained by the barrier layer and the heat sealing part of the container main body and the inner lid, and after the inner lid is peeled off and opened, The outer lid can be fitted over the flange portion of the container body and resealed.

JP-A-10-152157 JP 2014-122064 A

  However, in the containers shown in Patent Document 1 and Patent Document 2, since the outer lid is a resin molded product, the barrier property after resealing is sufficient even if polypropylene having a relatively excellent barrier property is used as the resin. I could not say.

  This invention is made | formed in view of said subject, Comprising: In addition to the time of unopening, it aims at providing the resealable sealing container which can obtain high barrier property also at the time of resealing.

  In order to achieve the above object, the present invention comprises the following aspects.

1) A container main body in which a metal laminate film molded body having a heat-sealing resin layer on the inner surface and a resin molded body covering the outer surface of the molded body are integrated, and a flange portion is formed in the opening; An inner lid made of a metal laminate film having a heat-sealing resin layer and heat-sealed releasably on the upper surface of the flange portion of the container body, and a resin molded body covering the metal laminate film molded body and the upper surface of the molded body With the outer lid formed integrally with the outer lid and the flange portion of the outer lid and the container lid with the inner lid peeled open, and detachably coupled to each other to form the metal laminate film molded bodies. A resealable sealed container provided with a resealing coupling means that can be brought into close contact.

2) The resealable sealed container of 1) above, wherein the resealing coupling means is a fitting part formed on the peripheral edge of the outer lid and the flange part of the container body.

3) The resealable sealed container of 1) or 2) above, wherein the outer lid is connected to the container body via a hinge so as to be opened and closed.

4) A container main body in which a metal laminate film molded body having a heat-sealing resin layer on the inner surface and a resin molded body covering the outer surface of the molded body are integrated, and a flange portion is formed in the opening; A metal laminate film molded body having a heat-sealing resin layer and a resin molded body covering the upper surface of the molded body, and a lid that is heat-sealed releasably on the upper surface of the flange portion of the container body. Re-sealing coupling means is provided on the peripheral edge portion of the lid and the flange portion of the container body so that the metal laminate film molded bodies can be brought into close contact with each other in a state where the lid is peeled and opened. A resealable sealed container.

5) The resealable sealed container according to 4) above, wherein the resealing coupling means is a fitting portion formed on the peripheral edge portion of the lid and the flange portion of the container body.

6) The resealable sealed container of 4) or 5) above, wherein the lid is connected to the container body via a hinge so as to be opened and closed.

According to the resealable sealed container of 1) above, when not opened, a high barrier property is obtained by the metal layer of the container body and the inner lid and the heat sealing part, and also when resealed by the outer lid, Since the metal laminate film molded bodies can be brought into close contact with each other at the peripheral edge portion of the outer lid and the flange portion of the container body by the connecting means, the barrier property is maintained.
Further, according to the resealable sealed container of 1) above, the container body and the outer lid are each formed by integrating the metal laminate film molded body and the resin molded body, and therefore excellent in shape retention. ing.

  According to the resealable sealed container of 2) above, since the resealing coupling means is the fitting portion, the outer lid can be attached and detached relatively easily, and the structure of the container main body and the outer lid Is not complicated and the cost can be reduced.

  According to the resealable sealed container of 3) above, since the outer lid is connected to the container body via the hinge, the outer lid can be easily opened and closed, and the outer lid can be lost. It can be avoided.

According to the resealable sealed container of 4) above, when not opened, a high barrier property is obtained by the metal layer of the container main body and the lid and the heat sealing portion. By means, the metal laminate film molded bodies can be brought into close contact with each other at the peripheral edge portion of the lid and the flange portion of the container body, so that the barrier property is maintained.
Furthermore, according to the resealable sealed container of 4) above, the container main body and the lid are each formed by integrating a metal laminate film molded body and a resin molded body, so that it is excellent in terms of shape retention. In addition, since an inner lid is not required, the cost can be reduced.

  According to the resealable sealed container of 5) above, since the resealing coupling means is a fitting portion, the lid can be attached and detached relatively easily, and the structure of the container body and the lid is complicated. The cost is reduced.

  According to the resealable sealed container of 6) above, since the lid is connected to the container body via the hinge, the lid can be easily opened and closed, and the loss of the lid is avoided. Can do.

It is a vertical sectional view which shows the state at the time of unopening of the resealable sealed container which concerns on 1st Embodiment of this invention. It is a vertical sectional view showing the state at the time of resealing the sealed container. It is a partial expanded sectional view which shows the laminated structure of the container main body which comprises the sealed container, an inner cover, and an outer cover. It is the figure which showed the formation process of the container main body of the sealed container sequentially. It is the figure which showed sequentially the formation process of the outer cover of the sealed container. It is a vertical sectional view which shows the state at the time of unopening of the resealable sealed container which concerns on 2nd Embodiment of this invention. It is a vertical sectional view showing the state at the time of resealing the sealed container. The state at the time of unopening of the resealable sealed container which concerns on 3rd Embodiment of this invention is shown, Comprising: (a) is a vertical sectional view, (b) is a partial expanded side view. It is a vertical sectional view showing the state at the time of resealing the sealed container. It is a partial expanded sectional view which shows the laminated structure of the lid | cover which comprises the sealed container.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS.

1 to 5 show a first embodiment of the present invention.
As shown in FIG. 1, the resealable sealed container (1A) according to the first embodiment includes a container body (2), an inner lid (3), and an outer lid (4). . In addition, illustration is abbreviate | omitted about the content accommodated in the container (1A) (hereinafter the same).

  The container body (2) has a substantially bottomed cylindrical shape, and the outer surface of the metal laminate film molded body (21) having the heat-sealing resin layer (212) on the inner surface is covered with the resin molded body (22). Do it. An annular flange portion (23) extending outward in the radial direction is formed in the opening of the container body (2). The flange portion (23) has a cross section bent in a substantially crank shape so that a step (231) is formed in the middle.

  The inner lid (3) is made of a metal laminate film (30) having a heat-sealing resin layer (303) on the lower surface, and the peripheral edge of the lower surface is thermally peelable to the upper surface of the flange portion (23) of the container body (2). It is sealed. The heat sealing part (H) is formed from the edge of the upper surface of the flange part (23) to a part slightly beyond the step (231). An opening knob (31) projecting radially outward from the edge of the flange (23) is integrally formed on a part of the periphery of the inner lid (3). By grasping this knob (31) with two fingers and pulling it upward, the inner lid (3) is peeled off from the upper surface of the flange (23) of the container body (2) and opened. .

The outer lid (4) is formed by integrating a metal laminate film molded body (41) and a resin molded body (42) covering the upper surface of the molded body (41), and has a top wall portion (4a) and a top wall. And a drooping edge (4b) extending downward from the periphery of the portion (4a). The top wall portion (4a) has a two-layer structure of a metal laminate film molded body (41) and a resin molded body (42), but the hanging edge portion (4b) is composed only of the resin molded body (42). Yes.
A step (43) corresponding to the step (231) formed on the flange portion (23) of the container body (2) is formed on the peripheral portion of the top wall portion (4a) of the outer lid (4), The cross section of the same part is substantially crank-shaped.
Although the outer lid (4) is shown separately from the container main body (2) in FIG. 1, a flange portion (from the top of the inner lid (3) to cover the opening of the container main body (2) ( 23) can be put on.

FIG. 2 shows a state in which the opening of the container body (2) is resealed by the outer lid (4) after the inner lid (3) is peeled and opened. That is, the drooping edge (4b) (fitting part) of the outer lid (4) is fitted from the top to the tip part (232) (fitting part) of the flange part (23) of the container body (2). As a result, the opposing surfaces of the metal laminate film molded body (41) of the outer lid (4) and the metal laminate film molded body (21) of the container body (2) are closely adhered to each other.
In this embodiment, since the step (231) (43) is formed in the flange (23) of the outer lid (4) and the container body (2), the metal laminate film molded body (41) (21) The contact area between each other is increased, and the adhesion is enhanced. However, if sufficient adhesion can be obtained without providing a step (231) (43), the flange (23) of the container body (2) and the outer lid (4) facing the container are flat. It is good.
In this embodiment, the resealing coupling means between the outer lid (4) and the container body (2) is constituted by the fitting portions (4b) (232), but is not limited thereto. Absent. For example, screw parts (male screw part and female screw part) and snap engagement parts (engagement claw and locking part) are formed on the peripheral part of the outer lid and the flange part of the container main body, and these are re-sealing coupling means It is good. Further, when the resealing coupling means is constituted by the snap engaging portion, the outer diameter of the step (43) of the outer lid (4) is set to 0.05 to 0 from the inner diameter of the step (231) of the container body (2). It is preferable to increase it by about 2 mm. With such a dimensional configuration, when the outer lid (4) is pushed toward the flange portion (23) of the container body (2) at the time of resealing, the steps (43) and (231) are pressed against each other, and the flange portion Since (23) is elastically deformed so as to spread outward, the fitting property between the engaging claw and the locking portion becomes more reliable, and the sealing property is further improved.

As shown in FIG. 3 (a), the metal laminate film molded body (21) of the container body (2) has a thermoplastic resin film (212) on both surfaces of the metal foil (211) via an adhesive (213). It is formed from a laminated metal laminate film (210). The metal laminate film (210) is formed by deep drawing or stretch forming.
The resin molded body (22) is formed by integrating the resin with the metal laminate film molded body (21) by injection molding, vacuum molding or pressure molding of the resin with respect to the metal laminate film molded body (21). . More specifically, for example, a metal laminate film molded body (21) previously deep-drawn is set in a mold of an injection molding machine, and a thermoplastic resin is formed from the concave outer surface side of the metal laminate film molded body (21). By melting and injecting the resin molded body (22) while forming the molded resin molded body (22), or on the outer surface of the concave portion of the pre-pressed metal laminated film molded body (21). In addition, by pressing the heated resin sheet by vacuum forming or pressure forming, it is possible to adopt a method in which the resin molded body (22) is closely integrated with the metal laminate film molded body (21) while being molded.
The heat-sealing resin layer is composed of a thermoplastic resin film (212) on the side far from the resin molded body (22).
The material of the metal foil (211) serving as the base of the metal laminate film (210) is not particularly limited. For example, aluminum foil (including aluminum alloy foil), stainless steel foil, copper foil, iron foil, nickel foil, and titanium foil are used. Used. However, in view of workability and versatility, a soft aluminum foil is preferably used. In addition, the thickness of the metal foil (211) is usually 7 to 150 μm, but is preferably 15 to 100 μm in consideration of the workability at the time of molding and the pinhole generation rate.
For the adhesive (213), for example, a two-component curable polyester polyurethane-based adhesive or a polyether polyurethane-based adhesive is used, and these are applied in a film thickness range of 1 to 5 μm.
As the thermoplastic resin film (212), highly versatile polypropylene films and polyethylene films, polyethylene acid-modified products, ionomers, acid-modified polypropylene, and the like can be used. The thickness of the thermoplastic resin film (212) is usually 20 to 150 μm, but preferably 20 to 80 μm in view of sealing properties and cost.
Examples of the resin used for the resin molded body (22) include random copolymer type polypropylene. The thickness of the resin molded body (22) is preferably 0.15 mm to 3 mm. That is, if the thickness of the resin molded body (22) is less than 0.15 mm, there is a risk of deformation and a decrease in sealing performance when the outer lid (4) is fitted to the flange portion (23), and the thickness is 3 mm. In the case where it exceeds 1, the difficulty of molding is increased, the cost is high, and the weight is increased.

As shown in FIG. 3 (b), the metal laminate film (30) constituting the inner lid (3) has a heat resistant film (302) attached to one side of the metal foil (301) via an adhesive (304). At the same time, an easy-open film (303) is bonded to the other surface via an adhesive (304). The heat-sealing resin layer is composed of an easy-open film (303).
The metal foil (301) is not particularly limited, and for example, aluminum foil (including aluminum alloy foil), stainless steel foil, copper foil, iron foil, nickel foil, and titanium foil are used. However, in view of workability and versatility, a soft aluminum foil is suitable. In addition, the thickness of the metal foil (301) is usually 7 to 100 μm, but is preferably 15 to 50 μm in consideration of the workability during molding and the pinhole generation rate.
As the adhesive (304), for example, a two-component curable polyester polyurethane-based adhesive or a polyether polyurethane-based adhesive is used, and these are applied in a thickness range of 1 to 5 μm.
As the heat-resistant film (302), in addition to using a stretched polyester film, polyamide film, polyethylene naphthalate film, polybutylene film, polypropylene film, a non-stretched film such as a heat-resistant polycarbonate film or polyimide film should be used. However, a polyester film or a polyamide film that is versatile and has high workability is preferable.
For the easy-open film (303), in order to provide an easy-open function, the film constituting the inner surface of the container body (2), that is, the heat-sealing resin layer of the metal laminate film molded body (21) is provided. A film that matches the material of the thermoplastic resin film (212) to be formed is used. For example, if the film (212) constituting the inner surface of the container body (2) is a polypropylene resin film, a propylene-ethylene copolymer polymer film or an acid-modified polypropylene film is used, and the former is a polyethylene resin film. If so, an acid-modified polyethylene film or ionomer film is used.

As shown in FIG. 3 (c), the metal laminate film molded body (41) of the outer lid (4) has the thermoplastic resin film (412) on both sides of the metal foil (411) via an adhesive (413). It is formed from a laminated metal laminate film (410). The metal laminate film (410) is formed by deep drawing or stretch forming. However, when the top wall (4a) of the outer lid (4) is flat without a step, the metal laminate film (410) may be cut into a predetermined shape, and such a product may also be a metal laminate. It shall be contained in a film molding.
The resin molded body (42) is formed by integrating the resin with the metal laminate film molded body (41) by injection molding, vacuum molding or pressure molding of the resin with respect to the metal laminate film molded body (41). . More specifically, for example, a metal laminate film molded body (41) previously deep drawn is set in a mold of an injection molding machine, and a thermoplastic resin is applied from the inside of the bottom of the metal laminated film molded body (41). By melt injection, a method of integrating with the metal laminate film molded body (41) while molding the resin molded body (42), or on the inner surface side of the recess of the metal laminate film molded body (41) that has been press-molded in advance, By pressing the heated resin sheet by vacuum forming or pressure forming, a method of closely adhering to the metal laminate film formed body (41) while forming the resin formed body (42) can be employed.
The material of the metal foil (411) used as the base of the metal laminate film (410) is not particularly limited. For example, aluminum foil (including aluminum alloy foil), stainless steel foil, copper foil, iron foil, nickel foil, and titanium foil are used. Used. However, considering the workability and versatility, a soft aluminum foil is optimal. The thickness of the metal foil (411) is usually 7 to 150 μm, but is preferably 15 to 100 μm in consideration of the workability during molding and the pinhole generation rate.
As the adhesive (413), for example, a two-component curable polyester polyurethane adhesive or a polyether polyurethane adhesive is used, and these are applied in a film thickness range of 1 to 5 μm.
As the thermoplastic resin film (412), in addition to highly versatile polypropylene films and polyethylene films, polyethylene acid-modified products, ionomers, acid-modified polypropylene, and the like can be used. The thickness of the thermoplastic resin film (412) is usually 20 to 150 μm, but it is preferably 20 to 80 μm in view of sealing properties and cost.
Examples of the resin used for the resin molded body (42) include random copolymer type polypropylene. The thickness of the resin molded body (42) is preferably 0.15 mm to 3 mm. That is, when the thickness of the resin molded body (42) is less than 0.15 mm, there is a risk of deformation when the flange portion (23) of the container body (2) is fitted, and the sealing performance is lowered, and the thickness is 3 mm. Exceeding this is not preferred because the difficulty of molding increases, the cost is high, and the weight increases.

FIG. 4 shows an example of a method for forming the container body (2).
First, as shown in FIG. 4A, a metal laminate film (210) having a very thin coating of lubricating silicone oil on both sides is trimmed into a circle having a predetermined diameter. Then, the trimmed metal laminate film (210) is set in a deep drawing die (7A) comprising a male die (71), a female die (72) and a wrinkle presser die (73) (see FIG. 4B). ), A circular deep drawing process is performed with the mold (7A) (see FIG. 4C), whereby a metal laminate film molded body (21) shown in FIG.
Next, the obtained metal laminate film molded body (21) is mounted on the convex mold (81) of the injection mold (8A) (see FIG. 4 (e)), and then the injection mold. (8A) is closed (see FIG. 4 (f)), and in this state, a resin melted by heating is injected from the central portion of the concave mold (82) toward the bottom of the metal laminate film molded body (21) (FIG. 4). (See (g)), and after cooling the resin, open the injection mold (8A). As a result, as shown in FIG. 4 (h), a container body (2) in which the metal laminate film molded body (21) and the resin molded body (22) are integrated is obtained.

FIG. 5 shows an example of a method for forming the outer lid (4).
First, as shown in FIG. 5 (a), a metal laminate film (410) having a very thin coating of lubricating silicone oil on both sides is trimmed into a circle with a predetermined diameter. Then, the trimmed metal laminate film (410) is set in a deep drawing die (7B) composed of a male die (71), a female die (72) and a wrinkle presser die (73) (see FIG. 5B). Then, circular deep drawing is performed with the mold (7B) (see FIG. 5C), whereby a metal laminate film molded body (41) shown in FIG.
Next, the obtained metal laminate film molded body (41) is mounted on the concave mold (82) of the injection mold (8B) (see FIG. 5 (e)), and then the injection mold ( 8B) is closed (see FIG. 5 (f)), and in this state, a resin melted by heating is injected from the central portion of the convex mold (81) toward the bottom of the metal laminate film molded body (41) (FIG. 5). (See (g)), and after cooling the resin, open the injection mold (8B). As a result, as shown in FIG. 5 (h), the outer lid (4) in which the metal laminate film molded body (41) and the resin molded body (42) are integrated is obtained.

6 and 7 show a second embodiment of the present invention.
The resealable sealed container (1B) of this embodiment is substantially the same as the sealed container (1A) of the first embodiment shown in FIGS. 1 to 5 except for the following points.
That is, in the sealed container (1B) shown in FIGS. 6 and 7, the outer lid (4) is connected to the container body (2) via the hinge (5) so as to be opened and closed.
The hinge (5) is a tip of a flexible hinge portion (44) formed in a tongue shape so as to be integrated with a part in the circumferential direction at the lower end of the hanging edge portion (4b) of the outer lid (4). The portion is formed by heat-sealing to the lower surface of the flange portion (23) of the container body (2).
The structure of the hinge is not limited to the above, and for example, the distal end portion of the hinge portion integrally formed with either the outer lid or the container body is inserted into the insertion portion formed on the other side. It may be good. Also, a hinge member made of a flexible sheet piece is prepared, and one end of the hinge member is joined to the outer lid by thermal fusion or the like, and the other end is joined to the container body by thermal fusion or the like. By doing so, it is also possible to constitute a hinge.
According to the sealed container (1B) of this embodiment, the opening and closing operation of the outer lid (4) is facilitated by the hinge (5), and the risk of losing the outer lid (4) can be avoided.

8 to 10 show a third embodiment of the present invention.
As shown in these drawings, the resealable sealed container (1C) according to the third embodiment includes a container body (2) and a lid (6).

  Since the configuration of the container body (2) is substantially the same as that of the first embodiment, the description thereof is omitted.

The lid (6) is formed by covering the upper surface of a metal laminate film molded body (61) having a heat-sealing resin layer (613) on the lower surface with a resin molded body (62) .
And as shown in FIG. 8, the lower surface peripheral part of the metal laminate film molded object (61) of a lid | cover (6) is heat-sealed so that peeling is possible on the flange part (23) upper surface of a container main body (2).
The lid (6) of this embodiment has substantially the same shape as the outer lid (4) of the first embodiment, and extends downward from the top wall (6a) and the periphery of the top wall (6a). And a drooping edge (6b). The top wall portion (6a) has a two-layer structure of a metal laminate film molded body (61) and a resin molded body (62), but the hanging edge portion (6b) is composed only of the resin molded body (62). Yes.
A step (63) corresponding to the step (231) formed in the flange portion (23) of the container body (2) is formed in the peripheral portion of the top wall portion (6a), and the cross section of the same portion is substantially It has a crank shape. The heat sealing part (H) is formed from the edge of the upper surface of the flange part (23) to a part slightly beyond the step (231).
The hanging edge (6b) is formed with a substantially U-shaped notch (65) that opens downward in a part of the circumferential direction.
In addition, the metal laminate film molded body (61) constituting the lower surface of the top wall portion (6a) is radially outward from the edge of the flange portion (23) through a notch portion (65) on a part of the periphery. An opening knob (64) projecting in the direction is integrally formed. The lid (6) is peeled off from the upper surface of the flange portion (23) of the container body (2) and opened by picking up the knob (64) with two fingers and pulling it upward.

FIG. 9 shows the container (1C) in a state where the lid (6) is peeled and opened, and then the opening of the container body (2) is resealed by the lid (6). That is, the drooping edge part (6b) (fitting part) of the lid (6) is fitted to the tip part (232) (fitting part) of the flange part (23) of the container body (2) from above. As a result, the opposing surfaces of the metal laminate film molded body (61) of the lid (6) and the metal laminate film molded body (21) of the container body (2) are closely adhered to each other.
Also in this embodiment, since the step (231) (63) is formed in the flange (23) of the lid (6) and the container body (2), the metal laminate film molded body (61) (21) ) The contact area between each other is increased and the adhesion is improved. However, the flange portion (23) of the container body (2) and the lid (6) portion facing the flange portion (23) may be flat.
Although illustration is omitted, in the sealed container (1C) of this embodiment, the lid (6) is provided via a hinge as in the sealed container (1B) of the second embodiment shown in FIGS. It may be connected to the container body (2) so that it can be opened and closed.

FIG. 10 shows a laminated structure of the lid (6).
The metal laminate film molded body (61) of the lid (6) is bonded to the thermoplastic resin film (612) on one side of the metal foil (611) via an adhesive (614) and to the other side with an adhesive ( 614) is formed from a metal laminate film (610) bonded with an easy-open film (613). The heat-sealing resin layer is composed of an easy-open film (613). This metal laminate film (610) is formed by deep drawing or stretch forming. However, when the top wall (6a) of the lid (6) is flat without a step, the metal laminate film (610) may be cut into a predetermined shape, and such a metal laminate film is also used. Included in the molded body.
The resin molded body (62) is formed by integrating the resin with the metal laminate film molded body (61) by injection molding, vacuum molding or pressure forming of the resin with respect to the metal laminate film molded body (61). .
The material and thickness of the metal foil (611) serving as the base of the metal laminate film (610), the type and application amount of the adhesive (614), and the material and thickness of the thermoplastic resin film (612) are described in the first embodiment. This is the same as the case of the outer lid (4). For the easy-open film (613), in order to provide an easy-open function, the film constituting the inner surface of the container body (2), that is, the heat-sealing resin layer of the metal laminate film molded body (21) is provided. A film that matches the material of the thermoplastic resin film (212) to be formed is used. For example, if the film (212) constituting the inner surface of the container body (2) is a polypropylene resin film, a propylene-ethylene copolymer polymer film or an acid-modified polypropylene film is used, and the former is a polyethylene resin film. If so, a polyethylene film, an acid-modified polyethylene film, an ionomer film or the like is used.
The material and thickness of the resin used for the resin molded body (62) are also the same as in the case of the outer lid (4) of the first embodiment described above.

  Next, specific examples of the present invention will be described, but the present invention is not limited to these examples.

<Example 1>
The container body (2), inner lid (3) and outer lid (4) (see FIGS. 1 to 5) constituting the resealable sealed container (1A) according to the first embodiment are as follows. Produced.
First, a 30 μm thick polypropylene film is applied to both surfaces of an A8079 annealed aluminum alloy foil classified by JIS H4060 with a thickness of 40 μm via a two-part curable polyester polyurethane adhesive with a coating amount of 3 g / m ^2. Bonding and curing at 40 ° C. for 3 days gave an aluminum laminate film for deep drawing. And as shown in FIG. 5, the silicone oil for lubrication is apply | coated very thinly on both surfaces of the aluminum laminate film (410), and it consists of a male type | mold (71), a female type | mold (72), and a wrinkle-holding type | mold (73). In the deep drawing mold (7B), after forming a circular deep drawing molded product having a diameter of 198 mmφ, a flange width of 2 mm, and a depth of 4 mm, that is, an aluminum laminate film molded body (41), this was formed into an injection mold (8B ) In the concave mold (82), the injection mold (8B) is closed, and 230 ° C. from the center of the convex mold (81) toward the inside of the bottom of the aluminum laminate film molded body (41). The MFR4 random copolymer type polypropylene resin heated and melted in (1) was injected so as to have an average thickness of 0.5 mm, and after cooling the resin, the injection mold (8B) was opened and the molded product was taken out. Through the above steps, an outer lid (4) in which the aluminum laminate film molded body (41) and the polypropylene resin molded body (42) were integrated was produced. The outer lid (4) has a width on the outer side of the step (43) in the top wall (4a) so that it can be fitted to the container body (2). The width was set to 4 mm which was the same as the width of 23), and the height of the hanging edge (4b) was set to 0.5 mm.
The container body (2) was produced by a method substantially similar to that of the outer lid (4) according to the process described with reference to FIG. Here, the aluminum laminate film molded body (21) had a diameter of 198 mm, a bottom diameter of 84 mmφ, a flange portion width of 2 mm, a depth of 40 mm, and a capacity of 220 ml. Then, the aluminum laminate film molded body (21) is mounted on the convex mold (81) of the injection mold (8A), the injection mold (8A) is closed, and the aluminum laminate film molded body (21 ) MFR4 random copolymer type polypropylene resin heated and melted at 230 ° C. toward the outside of the bottom of the mold) is injected so that the average thickness is 0.5 mm, and after cooling the resin, the mold (8A) is opened and the molded product is taken out. Thus, a container body (2) in which the aluminum laminate film molded body (21) and the polypropylene resin molded body (22) were integrated was obtained. The width of the flange part (23) of the container body (2) was 4 mm.
As a material for the inner lid (3) to be heat sealed on the upper surface of the flange portion (23) of the container body (2), a two-component curable polyester polyurethane adhesive is applied to one side of a 20 μm thick soft aluminum foil of JIS H4060 A1N30. An easy peel sealant film (made by Okamoto Co., Ltd.) made of polypropylene and polyethylene having a thickness of 50 μm is bonded to the other surface of the polyester film through a two-component curable polyester polyurethane adhesive. Alumina TP6 ”) is pasted and cured for 3 days at 40 ° C., and an aluminum laminate film (30) obtained by curing the adhesive is used, and the film (30) is trimmed to a predetermined shape. The inner lid (3) was prepared.

<Example 2>
The following container body (2), inner lid (3) and outer lid (4) constituting the sealed container (1A) were produced.
That is, first, an aluminum laminate film molded body (41) made of a circular deep-drawn molded product having a diameter of 198 mmφ, a flange width of 2 mm, and a depth of 4 mm was prepared in the same manner as in Example 1, and then plugged. By attaching the homopolypropylene sheet having a thickness of 0.2 mm to the inner side of the bottom of the aluminum laminate film molded body (41) by vacuum molding, the aluminum laminate film molded body (41 ) And a homopolypropylene sheet molded body (42) were integrated to produce an outer lid (4).
Further, in the same manner as in Example 1, an aluminum laminate film molded body (21) having a diameter of 198 mm, a bottom diameter of 84 mmφ, a flange width of 2 mm, a depth of 40 mm, and a capacity of 220 ml was prepared, and this was formed into a vacuum mold Attach the plug, by pressing on the bottom outside of the aluminum laminate film forming member (21) by a homopolypropylene sheet vacuum forming a thick 0.2 mm, the aluminum laminate film shaped body (21) and homopolypropylene sheet moldings ( 22) and a container body (2) were produced.
The inner lid (3) was the same as in Example 1.

<Example 3>
Container body (2), inner lid (3) and outer lid (4) constituting substantially the same container as the resealable sealed container (1B) according to the second embodiment (see FIGS. 6 and 7) Was prepared as follows.
First, the same container body (2), inner lid (3) and outer lid (4) as in Example 1 were prepared.
Then, a hinge member made of a homopolypropylene sheet piece of uniaxially stretched thickness 0.2 mm, width 5 mm, and length 10 mm is prepared, and one end of the hinge member is attached to the hanging edge (4b) of the outer lid (4). The outer lid (4) is attached to the container body (2) by heat-sealing to the lower end surface or the outer surface of the container body and heat-sealing the other end to the lower surface of the flange portion (23) of the container body (2) A hinge that can be opened and closed is formed.

<Comparative Example 1>
An outer lid having the same outer shape as the outer lid (4) of Example 1 was produced by injection molding of a random copolymer type polypropylene resin. Other than that was the same as Example 1.

<Comparative Example 2>
An outer lid having the same outer shape as the outer lid (4) of Example 1 was produced by injection molding of a random copolymer type polypropylene resin. Moreover, the container main body which has the same external shape as the container main body (2) of Example 1 was produced by injection molding of random copolymer type polypropylene resin. Other than that was the same as Example 1.

<Evaluation of moisture barrier properties of sealed containers>
After filling the container main body of each sealed container of Examples 1 to 3 and Comparative Examples 1 and 2 with 200 cc of distilled water, the opening of the container main body was covered with an inner lid, and the hot plate heated to 200 ° C. Heat sealing was performed by heating the flange portion with a pressure of 0.2 MPa for 3 seconds. Next, an unopened sealed container is formed by fitting an outer lid to the flange portion of the container body, and this is put into a thermostatic bath at 80 ° C., and the amount of weight change over half a year is measured over time. The moisture barrier properties of the containers were compared.
In addition, a similar test was performed even when the container main body and the outer lid were merely fitted without an inner lid, and the moisture barrier properties after resealing were compared.
The results are shown in Table 1.

  As shown in Table 1, in the sealed containers of Examples 1 to 3, there was almost no change in weight during storage for six months in a thermostatic bath at 80 ° C. with or without an inner lid. In Comparative Example 1, since there was no barrier layer on the outer lid, a change in weight was observed with the combination of the container body and outer lid alone. Further, in Comparative Example 2 in which the container body did not have a barrier layer, the weight reduction was further increased.

<Evaluation of gas barrier properties of sealed containers>
Subsequently, each sealed container of Examples 1 to 3 and Comparative Examples 1 and 2 was filled with 200 cc of commercially available 100% concentrated reduced grape juice, and then the opening of the container body was covered with an inner lid and heated to 200 ° C. Heat sealing was performed by heating the flange portion of the container body with a hot plate for 3 seconds while applying a pressure of 0.2 MPa. Next, an unsealed sealed container is formed by fitting the outer lid to the flange portion of the container body, and this is put in a constant temperature bath at 40 ° C. and stored for half a year, then the outer lid is removed and the inner lid is removed. Was peeled open, and the pigment change (discoloration of anthocyanins) in grape juice was observed.
In the same manner, after storing for 6 months in a constant temperature bath at 40 ° C. with the container body and outer lid fitted without an inner lid, the outer lid was removed and the pigment juice was observed for pigment change. .
The results are shown in Table 2.

  As shown in Table 2, in Examples 1 to 3, no pigment change was observed with or without an inner lid. In Comparative Example 1, since there was no barrier layer on the outer lid, a clear pigment change (fading due to oxidation) was recognized only by the combination of the container body and the outer lid. Further, in Comparative Example 2 in which the container body did not have a barrier layer, a clear pigment change (fading due to oxidation) was observed with or without an inner lid.

  The resealable sealed container according to the present invention can be sterilized by heating and pressure, and can maintain excellent barrier properties such as oxygen and water vapor when unopened and resealed. Consumables such as butter, jam, miso and other foods and seasonings that require long-term storage, canned food such as boiled, oil sardine, fruit, cooked food such as curry, stew, and gratin, pudding, jelly, etc. Therefore, it can be suitably used as a container for storing and storing contents such as foods and seasonings that are consumed in a plurality of times without taking time.

(1A) (1B) (1C): Sealed container
(2): Container body
(21): Metal laminate film molded body
(212): Heat-sealing resin layer
(22): Resin molding
(23): Flange
(3): Inner lid
(30): Metal laminated film
(303): Heat-sealing resin layer
(4): Outer lid
(41): Metal laminate film molding
(42): Resin molding
(5): Hinge
(6): Lid
(61): Metal laminate film molding
(613): Heat-sealing resin layer
(62): Resin molding

Claims (3)

A container body in which a metal laminate film molded body having a heat-sealing resin layer on the inner surface and a resin molded body covering the outer surface are integrated and a flange portion is formed in the opening;
An inner lid made of a metal laminate film having a heat-sealing resin layer on the lower surface and heat-sealed in a peelable manner on the upper surface of the flange portion of the container body;
It is equipped with an outer lid formed by integrating a metal laminate film molded body and a resin molded body covering its upper surface,
In the state where the inner lid is peeled and opened, a resealing coupling means is provided on the peripheral portion of the outer lid and the flange portion of the container body so that the metal laminate film molded bodies can be brought into close contact with each other. Resealable sealed container.   The resealable sealed container according to claim 1, wherein the resealing coupling means is a fitting portion formed on a peripheral edge portion of the outer lid and a flange portion of the container body.   The resealable sealed container according to claim 1 or 2, wherein the outer lid is removably connected to the container body via a hinge.

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