JPH03240675A - Package - Google Patents

Abstract

PURPOSE:To improve the efficiency of sterilizing treatment, to impart heat-resisting properties in an extent that a package can be held by a hand on heating and cooling and to prevent spill at the time of unsealing by fitting and unifying an internal vessel, in which content is filled and to which sterilizing treatment is executed, to an external vessel. CONSTITUTION:The quality of material having heat-resisting properties capable of coping with heating sterilization or retort sterilization is used for an internal vessel 2 having heat-resisting properties, and the internal vessel 2 has a flange for fitting and unifying an internal-vessel flange section 3 to the lower section of the inner surface of the opening section of an external vessel 1 by a fitting section 6. The external vessel 1 has heat-resisting properties and strength excellent in shape retention, and has structure in which an air gap section 9 is formed partially between the walls of the external vessel 1 and the internal vessel 2. An internal vessel cover material 4 has a peeling tongue 5 for unsealing, and has structure in which the peeling tongue 5 for unsealing of the internal vessel cover material is picked up easily by a finger. The internal vessel, in which content is filled and which is sterilizing-treated, is inserted into the external vessel, and fitted and unified by the fitting section 6, and the opening section of the external vessel is hermetically sealed by an external-vessel cover material 7.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to packaging for beverages such as coffee, liquid foods such as soup, and prepared foods, and is suitable for packaging beverages or foods that have been heat sterilized or retort sterilized. When eating or drinking, it can withstand heating and cooling when heated in a microwave oven, etc., or cooled with ice, etc.
The present invention relates to a package for food and beverages that does not overflow its contents and can be held by hand.

(Prior Art) Conventionally, there have been many containers and packages that can be heated in a microwave oven or cooled with ice or the like.

Among these containers and packages, those proposed as microwave-compatible containers have the disadvantage that the entire container is heated in the microwave and becomes so hot that it becomes a keyaki that cannot be held by hand.

There are also products that use resins such as styrofoam and foamed polypropylene, but the contents of these are dry, or the contents are placed in an attached bag-like package that can be transferred after heating. .

Furthermore, many double-walled containers have been proposed as packaging containers for storing hot or frozen/chilled items. (Utility Model 60-84519, Utility Model 60-101423,
Utility model 60-101424, 61-69076
, Utility Model Application Publication No. 62-159310, etc.) However, all of these proposed containers have a space between the inner container and the outer container for the sole purpose of insulation such as keeping cool or keeping warm. In both cases, heating or retort sterilization of the contents is not considered, and heating or retort sterilization after filling the contents into these containers is not possible due to the obstruction of these spaces. It's only close to possible.

Furthermore, these containers are sealed by sealing the top of the container, and there is a risk that the contents may spill when the lid is opened.

Measures such as increasing head space have been taken to prevent these spills, but both pose problems with heating and retort sterilization. The body was not obtained.

Furthermore, when heating with a microwave oven, etc., the volume increases due to expansion of the contents, or when cooling with ice, etc.,
The current situation is that we have to consider the volume for that amount, and we have to deal with this by transferring it to another container.

In addition, JP-A No. 61-35179 proposes a container with a foam layer as an outer container, but these were focused only on insulation properties, and were not compatible with microwave ovens or volume increases due to ice, etc. However, no one has yet been proposed that can meet the objectives of the present invention.

(Problems to be Solved by the Invention) The present invention improves the sterilization efficiency by fitting and integrating the inner container filled with contents and subjected to sterilization treatment to the outer container, and the sterilization processing efficiency is increased. To provide a package that can be held in the hand, has heat insulating properties, and can prevent spillage when opened.

(Means for Solving the Problems) The present invention consists of an inner container having heat resistance and an outer container having heat insulation properties, and the inner container is filled with contents and sterilized by heat treatment, retort treatment, etc. Next, by fitting and integrating the flange portion of the inner container inside the outer container, sterilization can be performed efficiently and easily, and since the foreign container has heat insulation properties when heated in a microwave oven, etc., it can be held by hand. The purpose is to provide a package that does not require transferring to another container even when the product is cooled with ice or the like.

(Actions and Examples) The present invention will be explained in more detail with reference to the drawings.

For the heat-resistant inner container (2) shown in Figure 1, it is necessary to select a material that has heat resistance that can handle heat sterilization or retort sterilization. However, it may be a molded product made of a single resin or a multilayer molded product made of a composite resin, and if necessary, it may be a molded product made of a tank bottom provided with barrier properties.

The inner container (2) has a flange for fitting and integrating the inner container flange part (3) with a fitting part (6) at the lower part of the inner surface of the opening of the outer container (1),
The strength of these inner containers only needs to be thick enough to retain their shape to a certain extent, and the strength and rigidity of a normal single container are not so necessary, and the thickness should be enough to protect the contents. It is sufficient if the thickness is approximately X of the wall thickness of the container.

The outer container (1) used in the present invention may be any material as long as it has heat insulation properties and strength with excellent shape retention, and foamed polystyrene, foamed polypropylene, etc. are used.

The outer container (1) is formed with a fitting part (6) that fits with the inner container flange part (3) on the inner surface below the opening, and this opening and the fitting part (6) The dimensions form a space 10 that prevents spillage of the contents upon opening.

In the case of regular coffee, this space Oω can store a spoon, milk, sugar, etc., and in the case of soup, it can also serve as a space in which a spoon, croutons, etc. can be stored.

In addition, a structure is formed in which a gap (9) is partially formed between the walls of the outer container (1) and the inner container (2), and these gaps (9) allow the inner container (2) ) becomes even more difficult to transmit to the outer surface of the outer container.

Note that the inner container receiving portion (8) shown in Fig. 1 is an example in which it is formed on the bottom surface of the outer container and its periphery; It is not limited to the central part of the bottom, and may be the center part of the bottom.Furthermore, the inner surface of the outer container may have a lip-like shape, or the outer wall of the inner container may have a lip-like protrusion. It may also have a similar structure.

In these double-structured packages, the inner container is first filled with contents, and the flange (3) at the opening of the inner container is sealed with the inner container lid (4). The seal desirably has a so-called easy-open seal strength that is strong enough to withstand heating or retort sterilization of the inner container, and also allows for easy opening.

In addition, the inner container lid material (4) needs to have a shape with a peel tongue (5) for opening.
5), when the inner container (2) is fitted to the outer container (1), the space aω consisting of the inner container lid and the outer container is always formed.
It is necessary that the opening peel tongue (5) of the inner container lid material can be easily pinched with fingers.

In this way, the contents are filled into the inner container, sterilized, and inserted into the outer container.Then, they are fitted together at the fitting part (6), and if necessary, the contents to be added to the space 0ω are stored. Then, the opening of the outer container is sealed with an outer container lid (7).

Furthermore, although the outer container fitting part and the inner container flange part are fitted and integrated, the fitting strength of this fitting part may be stronger than the peel strength required to open the inner container. In order to obtain the desired strength, the inner container receiver formed at the bottom of the outer container may be bonded to part (8) or a part of the side wall surface with an adhesive.

The outer container lid material (7) may be formed by sealing the outer container flange portion with a film material, etc., or by sealing the cap using a heat-shrinkable biaxially stretched film, or by molding it as shown in the figure. Fitting and sealing using a lid material may also be used, and it is not particularly necessary for the outer container to be completely sealed, and an appropriate sealing method is selected.

The shape of the package is not limited to the cup-like shape shown in the figure, but may be oval or other tray-like shapes.

(Effects of the Invention) The packaging body of the present invention can be easily sterilized by heating or retort sterilizing only the inner container after filling and sealing the contents in the inner container. The first effect is that sterilization can be performed efficiently without the need to provide space.

In addition, when the contents are heated in a microwave oven, etc., the outer container and the cavity have excellent insulation properties, so it can be held in the hand, and it can also be used to cool the contents with ice, etc. Even if the inner container is opened, there is no need to change the container, and you can simply add ice to cool the container.There is no need to worry about spillage when opening the inner container, and it is also safe to add other additives to the contents. This packaging is made with care.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of the package of the present invention.

Claims (1)

[Claims] (1) In a package consisting of an outer container with heat insulation properties and an inner container with heat resistance, the flange portion 3 of the inner container 2 is fitted and held on the inner wall surface below the opening of the outer container 1. It has a structure in which the outer container 1 and the inner container 2 are integrated by the fitting portion 6, and the inner surface of the outer container and the outer surface of the inner container partially form a gap 9. The inner container 2 is filled with contents, sealed with a lid material 4 having an opening peel tongue 5, and after heating or retort treatment, the inner container 2 and outer container 1 are fitted together. The packaging body is formed by fitting and integrating the parts 6 and then sealing the opening of the outer container with the outer lid member 7.