JPH06345146A - Packaging device - Google Patents

Abstract

PURPOSE:To contrive the sterilization by heating of a container body without causing deformation by a method wherein the container body is filled with its contents in a heated condition, the opening of the container body is sealed with a lid body and, after the contents are cooled to near normal temperature, an air hole of the container body are sealed with film-like seal body. CONSTITUTION:A packaging container 1 consists of a container body 2 for holding its contents and a lid body 4 for closing an opening 3. The container body 2 is made up of a cylindrical body 5 and a bottom board 8 having its peripheral edge 7 fixed to the folded-back part 6 of the cylindrical body. An air hole 9 is made near the upper edge of the cylindrical body 5 and is covered with a filter 10 which passes gas while preventing the passage of bacteria. After filling the container body 2 with its contents in a heated condition, a lid body 4 is fitted over and heat sealed to the container body 2. The packaging container 1 is entirely cooled to normal temperature and, after air is admitted from outside through the filter 10 into the container body 2 to prevent the reduction of the pressure therein, the air hole 9 is covered with a film-like seal body 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging container for filling and packaging contents in a heated state.

[0002]

2. Description of the Related Art Generally, when a food or drink is packed in a packaging container, the content of the food or drink is heat-sterilized and then sealed in the packaging container (container) to endure long-term storage. I am trying. In this case, in order to reduce the invasion of bacteria into the container, it is desirable to seal immediately after filling the heated contents. However, if sealed in a heated state, the pressure inside the container will drop as the contents cool, and there is a weak paper container such as a container made of a flexible material that is easily deformed by external pressure. , The container cannot retain its shape due to the internal pressure drop, and it dents. Therefore, the appearance may be deteriorated and the commercial value may be lost.

[0003]

DISCLOSURE OF THE INVENTION The present invention is intended to improve such conventional drawbacks, and provides a heating contents-filled packaging container which does not impair the heat sterilization effect and does not cause deformation of the container. To do.

[0004]

In order to achieve such an object, the present invention provides an air permeable filter that allows gas to pass through a flexible material container body or container lid but does not filter bacteria. After preparing a container with a closed ventilation hole, fill the container body with the heated contents, then seal the container lid and cool to near room temperature, then make the ventilation hole thermoplastic. The packaging container is hermetically sealed with a film-like sealing body such as the plastic film.

[0005]

EXAMPLES The present invention will be described below with reference to examples. Figure 1
(a)-(c) is sectional drawing which shows the packaging container for heating contents by one Example of this invention.

The packaging container (container) 1 of this embodiment is shown in FIG.
As shown in (a), it comprises a container body 2 for containing the contents and a container lid 4 for closing the container mouth 3 of the container body 2. The container body 2 is composed of a tubular body 5 and a bottom plate 8 having a peripheral edge 7 fixed to a folded-back portion 6 at the lower end of the tubular body 5, and a vent hole 9 is provided near the upper edge of the container mouth 3 side. It is provided. Although gas such as air permeates through the vent holes 9,
Commercially available filter 1 that does not filter bacteria
It is blocked by 0. The filter 10 is attached inside the tubular body 5. In addition, the container lid 4 is entirely depressed at the center, and the periphery has a V-shaped groove 11 that fits into the container rim of the container body 2. Further, each part of these containers is formed by cutting, molding or heat-sealing a suitable laminate sheet. For example, as a laminate sheet, polyethylene 20 μ / paper 300 g / m ² / polyethylene 20 μ / aluminum 9 μ / polyethylene 60 μ
Alternatively, polyethylene 50μ / aluminum 130μ
/ Polyethylene 100 μ or the like is used. It should be noted that each part of these containers should not be made of a material that deteriorates the quality of the contents, nor should it be deteriorated by heat during filling.

Next, a method of filling the contents will be described. First, after preparing the container 1 as shown in FIG. 1 (a), as shown in FIG. 1 (b), the container body 2 is filled with the contents 12 in a heated state. Next, the container lid 4 is directly fitted into the container body 2 and sealed by heat sealing. As a result, external bacteria do not enter the container 1 from the outside, and the contamination of the contents can be prevented.

After that, the entire container is cooled to near room temperature.
At this time, the pressure inside the container drops as the contents 12 cool, but in order to suppress this pressure drop, air flows from the outside to the inside through the filter 10 of the ventilation hole 9. As a result, no deformation occurs even in a paper container having a weak strength. Further, even when the air from the outside is introduced into the container 1, the filter 10 filters the fungi, so that the bacteria do not enter the container 1. An example of such a filter is "Serpore NW-01".
(Registered trademark of Sekisui Chemical Co., Ltd.), which can be easily attached by means such as heat sealing.

Next, when the inflow of air into the filter 10 is stopped, as shown in FIG. 1 (c), a film-like sealing body 13 is attached to the outer periphery of the container body 2 to close the air vent 9 and seal it. As the film-like sealing body 13, for example, a tape made of aluminum 30 μ / polyethylene 50 μ is used and attached to the container body 2 by heat sealing. In this way, the ventilation hole 9 can be sealed with almost no external force applied to the container, so that the sealing method is simple and there is no risk of container deformation.

[0010]

According to such an embodiment, the contents 12
Is completely sealed and can be stored for a long time. This has been confirmed by performing a ventilation test after closing the ventilation hole and a long-term storage test in which the food is actually filled.

In the above embodiment, the vent hole 9 is formed in the container body.
In addition to this, as shown in Fig. 2 (a),
In a container 1 composed of a container body 2 and a container lid 4, a vent hole 9 having a filter 10 which is breathable and non-fungal is attached is provided in the container lid 4 as shown in FIGS. 2 (b) and 2 (c). As shown, even if the contents 12 are heated and filled, cooled, and the film-like sealing body 13 is sequentially applied, and the contents are filled and packaged, the same effects as in the above-described embodiment can be obtained.

As described above, according to the present invention, the heating contents can be filled and packaged without reducing the sterilizing effect of the heating contents and without causing the deformation of the container, and the heating contents are deformed even at room temperature. A packaging container can be obtained in which

[Brief description of drawings]

1A to 1C are cross-sectional views showing a packaging container for heated contents according to an embodiment of the present invention.

FIG. 2 is a similar sectional view according to another embodiment.

[Explanation of symbols]

 1 container 2 container body 4 container lid 9 ventilation hole 10 filter 12 contents 13 film-like seal.

Claims (1)

[Claims] 1. A shape-retaining container or container lid made of a flexible material, which is provided with a vent hole that is permeable to gas but impervious to bacteria and the like and is closed by an air-permeable filter, which is easily deformed by external pressure in a closed state. The container is composed of a contents filled in the container in a heated state, sealed with a lid and then cooled, and a film-like seal body having a vent hole closed after the contents are cooled to room temperature. Packaging container.