JPH0568874U - Food container with easy access to contents - Google Patents

Abstract

(57) [Abstract] [Purpose] The existing container does not depend on the container material and molding method, and it is a simple secondary process that does not require an extra space to protect the protrusions for making small holes. A small container suitable for foods with high viscoelasticity that can freely provide oxygen gas barrier property and light shielding property even if it is thin. [Structure] A food container in which a ventilation hole having an area of about 1 mm ² or more is provided in a flat portion of the bottom, and the ventilation hole is heat-sealed with a sealing material.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The food container of the present invention relates to a dessert such as pudding, jelly, mousse or a cooked food which has viscoelasticity and is suitable for a food which is difficult to remove from the container.

[0002]

[Prior Art]

 Conventionally, polystyrene injection containers have been used as containers for puddings, jellies, etc.By forming a protrusion on the bottom of the container and breaking it off, a small hole is created in the bottom of the container. There are products that can be taken out easily.

However, in this case, it is not possible to provide a protrusion at the bottom of the container in the case where the material of the container is a cold-formed container, for example, a composite container such as a plastic-metal foil (aluminum foil). In addition, even if the container is made of plastic, if it is made of plastic other than brittle plastic such as polystyrene, even if protrusions are formed by injection processing, small holes will not be created due to its toughness, or pressure molding, vacuum molding, etc. It is not possible to process small projections in a container made of a thin material such as a container.

Providing the protrusions requires a protective measure for preventing the breakage of the protrusions and a space therefor, which makes the package bulkier than the contents.

[0005]

[Problems to be solved by the device]

 The present invention does not depend on the material, material, or molding method of the container, and is a simple secondary processing (it may be done at the same time when the container is molded) for existing containers, and protects the protrusions. The aim is to develop a food container suitable for foods with high viscoelasticity that does not require extra space.

[0006]

[Means for Solving the Problems]

The present invention has the above-mentioned object by developing a food container that is easy to take out contents, characterized in that a vent hole having an area of about 1 mm ² or more is provided at the bottom of the container, and the vent hole is sealed by a sealing material. Was achieved.

The container to which the present invention is applied is a hermetically sealed container, and the material thereof is particularly plastic, metal or the like, as long as it can be used for a viscoelastic food container such as pudding, jelly or mousse. There is no limit.

For example, a composite container made by cold forming such as a resin-coated foil or a laminated foil, a barrier, a non-barrier type injection container, a plastic container made by a forming method such as vacuum forming, pressure forming and the like are targeted. Becomes

The bottom flat portion of such a container is provided with a vent hole, although the shape thereof is not limited. This through hole is usually circular and has a diameter of about 1 mmφ or more, but about 1/2 or less of the diameter a 1 of the flat portion on the bottom surface of the container. If the ventilation holes are less than about 1 mmφ, the air will not enter well, and if the diameter a of the bottom flat part is 1/2 or more, the space for sticking the sealing material will be insufficient and the rigidity of the container will be reduced. become. For the sealing material that seals the ventilation holes, take a structure that matches the material of the container.

For example, when the material of the container is a laminate of aluminum foil / plastic film, from the container side (sealing surface), an olefin sealant / polyurethane adhesive / aluminum foil / polyurethane adhesive / biaxially stretched polyester It is preferable to use a sealing material (laminate containing aluminum foil) made of a film.

On the other hand, when a metal foil is not contained in a polypropylene container or the like, a laminate sheet containing no aluminum foil may be used as a sealing material.

Although this food container can be manufactured in various orders depending on the material composition, for example, when laminating sheet is heated and vent holes are simultaneously provided at the time of press molding, a sealing material is heat-sealed to the contents. It is possible to carry out integrated work up to filling by filling the items and then heat-sealing and sealing the lid.

It is preferable that the sealing material is sealed in a flat portion around the vent hole to have a length of at least 1 mm and 10 mm or less. If it is less than 1 mm, the sealing property tends to be incomplete, and if it is more than 10 mm, the unsealing property becomes poor and the place where the ventilation hole is provided in the flat portion of the bottom of the container is restricted.

Further, it is preferable that a part of the sealing material is grasped by hand to form a non-heat-sealed portion where the sealing material can be peeled off.

The seal side of the container (sealing surface of the flat portion on the bottom surface of the container) and the sealant of the sealing material must be heat sealable and easy to open.

[0016]

[Action]

 In the conventional container, the ventilation hole did not exist at the manufacturing stage of the container and was generated by breaking off the protrusion.In the present invention, the ventilation hole of the container provided with the ventilation hole is heated by the sealing material. It is designed so that it can be sealed for the time being, and when this sealing material is taken out from the container, it can be peeled off to function as a ventilation hole.

For this reason, since there is no protrusion and a space for protecting the protrusion is not required, and in order to break the protrusion, it is limited to integral molding of injection of polystyrene or the like, which is brittle in terms of material. In the food container of the invention, as long as it is a heat-sealable material, it can be applied not only to plastics but also to containers formed of resin-coated metal, resin-aluminum foil laminated sheet, various resin laminated sheets and the like.

[0018]

【Example】

(Example 1) As shown in FIG. 1, a non-stretched polypropylene film 1 (thickness 300 μm), a 1N 30 aluminum foil 2 (120 μm), and a non-stretched polypropylene film 3 were applied to a polyurethane dry laminating adhesive 4 g / m ² Was laminated by. This composite sheet was cold-formed into a container having ventilation holes 5. From the seal side, olefin sealant (30 μm), polyurethane dry laminate adhesive (3 g / m ² ), 1N30 aluminum foil (7 μm), polyurethane adhesive (3 g / m ² ), biaxially stretched polyester film (12 μm) The composite film having the constitution was used as the sealing material 4, which was heat-sealed to the flat portion on the bottom surface of the container, and the ventilation hole 5 was closed. The sealing material could be easily peeled off by pinching and pulling the part that was not heat-sealed.

Example 2 A polypropylene sheet having a thickness of 200 μm was provided with ventilation holes, and from this side, an olefinic sealant (30 μm), polyethylene (20 μm), polyurethan dry laminating adhesive (0.5 g / m ² ), A sealing material composed of a three-layer laminate of a biaxially stretched polyester film (12 μm) was heat-sealed to seal the ventilation hole. Then, this polypropylene sheet was vacuum formed by a conventional method to prepare a food container. The sealing material could be easily peeled off by pinching and pulling the part that was not heat-sealed.

Example 3 A resin-coated metal foil container provided with a ventilation hole (vinyl chloride, vinyl acetate co-polymer resin 8 g / m ² , aluminum foil 120 μm, thermosetting vinyl resin 2 g / m ² from the inner surface) was sealed. From the surface, a laminate of acrylic resin (4 g / m ² ), vinyl chloride / vinyl acetate copolymer resin (4 g / m ² ), aluminum foil (70 μm), and epoxy resin (2 g / m ² ) was heat-sealed. This sealing material was easy to open.

[0021]

[Effect of the device]

 The food container according to the present invention, in which the contents can be taken out easily, does not require any protection such as a projection to be broken off at the bottom of the container, and only the sealing material is heat-sealed to the flat portion on the bottom of the container. Does not require space.

Further, the container material may be any material as long as it can be heat-sealed, and the range of application can be greatly expanded.

Further, although the conventional method is limited to the molding container by the injection method, since the container of the present invention only needs to be provided with ventilation holes in the container which is usually used and heat-sealing the sealing material, for example, a cold container can be used. It can be applied to molded metal foil-resin composite containers, compressed air or vacuum molded thin-walled containers, or plastic containers.

Particularly in the case of a sheet having an oxygen gas barrier property, for example, a container formed with a barrier resin or a laminate sheet, the oxygen gas barrier film can be used as the sealing material as well. Also, when an aluminum foil laminated body or a resin-coated aluminum foil is molded, it is possible to provide a container in which contents having an oxygen gas barrier property and a light shielding property can be easily taken out.

[Brief description of drawings]

FIG. 1 is a diagram showing a bottom surface portion of a food container.

FIG. 2 is an enlarged view centering on a ventilation hole of a container.

[Explanation of symbols]

 a Diameter of flat part on bottom of container b Diameter of vent hole 1 Unstretched polypropylene 2 Aluminum foil 3 Unstretched polypropylene 4 Sealing material 5 Vent hole

Claims (2)

[Scope of utility model registration request] 1. A food container in which contents can be easily taken out, characterized in that a vent hole having an area of about 1 mm ² or more is provided at the bottom of the container, and the vent hole is sealed by a sealing material. 2. The food container according to claim 1, which is a container made of a plastic or a laminate of a plastic and an aluminum foil, which is compressed or vacuum-molded.