KR100430516B1 - Sealed container - Google Patents

Abstract

It provides a sealing container filled with contents larger than the main container, heat-sealing the lid container and the main container, which has airtightness and is easy to open.

The outermost layer is a polycarbonate, and the innermost layer is formed of a cover container having a flange portion and a convex portion and a body container having a flange portion, formed from a multilayer container of two or more layers, the main body container and a resin capable of heat sealing. 2. A sealing container in which a flange portion of a lid container and a main body container of which a fitting portion is formed at the edge of the flange portion to be covered by the other flange portion, is heat sealed in the flange portion, and is heat sealed.

Description

Sealing container {SEALED CONTAINER}

With the diversification of lifestyles, cooked foods filled in sealed containers are becoming widely used in general households. Pressurized heat sterilized cooked food can be preserved at room temperature for about one year without impairing the taste, and can be provided to a meal by heating in a microwave oven or boiling water. At the time of appearance, these foods were mainly provided in bags, but the types of foods were curry, meatballs, hamburg, boiled vegetables, Chikuzenza roll cage, With the diversification of steamed rice in soup bowls, soups, red bean paste, etc., a sealing container for easy opening that can be placed on a table as it is required is desired.

Conventionally, as a sealing container for easy opening formed by heat-sealing a lid container and a main body container, one having the following shape is used. 1 is an explanatory view of a conventional sealing container. The sealing container shown in this drawing consists of the flange part 1 and the recessed part 2 shape | molded by the multilayer sheet of two or more layers whose innermost layer is resin which can be heat-sealed with the innermost layer of a main body container, The recessed part consists of A cover container 3 fitted with the main body container, and a main body container 5 having a flange portion 4. After the food container 6 is filled with the main container, the lid container is fitted into the main container. Since the lid container is positioned by the fitting of the lid container to the main body container, and there is no fear that the lid container is displaced from the main body container, the container is placed on the heat seal support 7 in this state, and the heat-sealing plate By pressing under certain conditions under (8), the lid container and the main body container can be heat-sealed and sealed at the flange portion. Further, by appropriately selecting the material of the flange portion and the heat sealing conditions, it is possible to give the ease of opening that can be opened by a human hand with the heat-sealed flange portion. However, such a conventional easy-opening sealing container has a structure in which the lid container has a concave portion in order to fit the lid container and the main body container, so that the contents to be filled are less than the capacity of the main body container. As a recent trend, it was not possible to cope with the case where the contents having the volume and the like which have the volume as the contents.

In addition, in the case of filling a food with a larger capacity than the main body container, the non-sealing container was conventionally used only. 2 is an explanatory view of one embodiment of a conventional hermetic container. The container shown in this figure consists of the flange part 1 and the convex part 9, and the cover which has the fitting part 10 covered by the peripheral part of the flange part of a main body container at the peripheral part of a flange part. It consists of the container 3 and the main body container 5 which has the flange part 4. As shown in FIG. After the food container 6 is filled with the main body container, the cover is fixed by covering the fitting portion formed at the circumferential edge of the flange part of the cover container with the flange part of the main body container. Such a container is conventionally not used as a heat seal and is mainly used for foods such as lunches, sushi, Japanese sweets, etc., which are not required to be used. The material of the container is a stretched polystyrene resin sheet, a vinyl chloride resin sheet, or the like. Single layer material is used.

An object of the present invention is to fill a larger content than a main body container, heat seal the lid container and the main body container, and provide an airtight and easy-opening sealing container.

[Initiation of invention]

MEANS TO SOLVE THE PROBLEM The present inventors earnestly researched in order to solve the said subject, and, as a result, the outermost layer is a polycarbonate with heat resistance, and the innermost layer is fitted with the main body container shape | molded by the multilayer sheet which is resin which can be heat-sealed with the main body container. By discovering that a lid container with a part is heat-sealed with the main body container in the flange portion, a sealing container with easy opening can be obtained, and the present invention has been completed based on this knowledge.

That is, the present invention,

(1) The outermost layer is a polycarbonate, and the innermost layer is formed of a cover container having a flange portion and a convex portion and a main body container having a flange portion, formed of a multilayer container having two or more layers, the main body container and a resin capable of heat sealing. The flange portion of the flange portion of the cover portion and the main body container, which is formed at the edge of the flange portion and is fitted over the other flange portion, is heat-sealed and heat-sealed in the flange portion,

② The innermost layer of the cover container is polypropylene, low density polyethylene, low linear density polyethylene, high density polyethylene, ethylene-vinyl acetate copolymer, polystyrene, acid-modified polyethylene, ethylene-methacrylic acid copolymer and ethylene-methacrylic acid copolymer The sealing container according to the above-mentioned ①, which is one or two or more mixtures selected from.

(3) The said sealing container is an agent which adds the intermediate | middle layer which consists of a laminated structure of polypropylene / (ethylene-vinyl acetate copolymer soap sulphide or polyvinylidene chloride) sequentially from the outer layer side between the outermost layer and the innermost layer. Seal container as described in (1).

(4) The sealing container according to (1), (2) or (3), wherein the main body container is formed of a three-layered sheet laminated with polypropylene / ethylene-vinyl acetate copolymer soap sulphide / polypropylene.

(5) The sealing container according to the above (1), (2) or (3), wherein the lid container has a ridge that fits around the upper portion of the convex portion with the bottom of the main body container which is a separate shape.

(6) The sealing container according to (1), (2) or (3) described above, wherein the body container has a concave portion that can be convexly deformed by internal pressure at the time of heating.

Moreover, as a preferable aspect of this invention,

(7) The sealing container according to (1), (2) or (3), wherein the cover container has an opening tab.

Can be mentioned.

The present invention relates to a sealed container. In more detail, this invention relates to the easily openable sealing container which can be used suitably for packaging of foods etc. which are made by heat-sealing the lid container and main body container which have convex shape.

1 is an explanatory view of a conventional sealing container

2 is an explanatory view of one embodiment of a conventional hermetic container

3 is an explanatory view of one embodiment of a sealing container of the present invention;

4 is a cross-sectional view showing a state during opening of the sealing container of the present invention.

5 is an explanatory view of a sealing container of the present invention having a ridge in the lid container;

Figure 6 (a) is a plan view of the sealing container of the present invention having a recess in the bottom of the main body container

6 (b) and 6 (c) are cross-sectional views of the sealing container of the present invention having a recess at the bottom of the main body container.

Figure 7 (a) is a plan view of the sealing container of the present invention having an opening tab in the cover container

Figure 7 (b) is a cross-sectional view of the sealing container of the present invention having an opening tab in the cover container

8 is an explanatory view of the sealing container of the present invention filled with boiled vegetables

In the drawings, reference numeral 1 denotes a flange portion, reference numeral 2 denotes a concave portion, reference numeral 3 denotes a cover container, reference numeral 4 denotes a flange portion, reference numeral 5 denotes a main body container, reference numeral 6 denotes a food container, and reference numeral 7 denotes a container. The heat seal holder (8) is a heat seal nib, (9) is a convex portion, (10) is a fitting portion, (11) is a ridge portion, (12) is a recessed portion, and (13) is an opening tab.

Best Mode for Carrying Out the Invention

The lid container of the sealing container of this invention is shape | molded by the multilayer sheet of two or more layers whose outermost layer is polycarbonate, and whose innermost layer is resin which can be heat-sealed with the innermost layer of a main body container. Since the polycarbonate has a glass transition temperature of about 150 ° C. and a temperature at which the fluid flow occurs at about 240 ° C. and excellent heat resistance, the polycarbonate can sufficiently withstand the heat seal hot plate temperature 150 to 190 ° C. which is a normal heat seal condition. Moreover, since polycarbonate is excellent in transparency and the contents which were filled can be seen from the outside, it is suitable for use as a food container.

The innermost layer of the multilayer sheet used for forming the cover container can be used without particular limitation as long as it is a resin that is heat sealable with the innermost layer of the main body container. However, under normal heat sealing conditions, the innermost layer of the main body container has a moderate degree of peeling strength. It is preferable to select a resin which has an easy opening property. As such resin, for example, polypropylene, low density polyethylene, high density polyethylene, linear low density polyethylene, ethylene-vinyl acetate copolymer, acid-modified polyethylene, polystyrene, ethylene-methacrylic acid copolymer, ethylene-methacrylic acid copolymer metal crosslinking And water. These resins can be made into an innermost layer only by 1 type, or can mix 2 or more types of resins into an innermost layer. As the mixed resin of the innermost layer of the multilayer sheet used for forming the cover container, for example, a mixture of polypropylene and low density polyethylene, polypropylene and high density polyethylene, polypropylene and ethylene-vinyl acetate copolymer, polypropylene and polystyrene Resin can be mentioned.

Ethylene-vinyl acetate copolymer soaps and vinylidene chloride resins are used to improve gas barrier properties such as oxygen, nitrogen, and carbon dioxide between the outermost layer and the innermost layer of the multilayer sheet used for forming the cover container. Moreover, vinylidene chloride resin, polypropylene, polychlorotrifluoroethylene, etc. can be laminated suitably for the purpose of improving water vapor barrier property. As a multilayer sheet used for forming such a cover container, for example, a multilayer sheet having a four-layer structure of a mixed resin of polycarbonate / polypropylene / ethylene-vinyl acetate copolymer soap sulphide / polypropylene and high density polyethylene, poly And multilayer sheets having a four-layer structure of a mixed resin of carbonate / polypropylene / polyvinylidene chloride / polypropylene and high density polyethylene.

The main body container of the sealing container of the present invention is a single layer sheet which can be heat-sealed with the innermost layer of the multilayer sheet used for forming the lid container, and can be easily opened, or a multilayer sheet used for molding the lid container. The innermost layer and the heat seal can be formed, and the resin which can be easily opened can be molded into a multilayer sheet having the innermost layer. As such a single layer sheet, single layer sheets, such as polystyrene, polypropylene, and polyvinyl chloride, are mentioned, for example, As a multilayer sheet, for example, polypropylene / ethylene-vinyl acetate copolymer soap / polypropylene And multilayer sheets. In order to obtain particularly good openability, the innermost layer is made of polypropylene and low density polyethylene, polypropylene and low density polyethylene and high density polyethylene, polypropylene and ethylene-methacrylic acid copolymer metal crosslinked material, polypropylene and ethylene-methacrylic acid copolymer. It is preferable to use mixed resins such as these, and linear low density polyethylene.

When the food is filled into the sealed container of this invention, and it is pressure heating sterilization and it is set as a retorto pouch food, the material of a lid container and a main body container shall be able to withstand the processing conditions in a pressure heating sterilization pot. As a suitable material for such a retort pouch food, for example, the cover container is a combination of a two-layered sheet of a mixed resin of polycarbonate / polypropylene and high-density polyethylene, the body container is a single layer sheet of polypropylene, or a cover container. 4-layer sheet of mixed resin of polycarbonate / polypropylene / ethylene-vinyl acetate copolymer soap / polypropylene and high-density polyethylene, and main body container made of 3-layer sheet of polypropylene / ethylene-vinyl acetate copolymer soap / polypropylene One combination is mentioned.

There is no restriction | limiting in particular in the manufacturing method of the multilayer sheet used for the sealing container of this invention, It can manufacture by well-known lamination methods, such as dry lamination, coating, extrusion lamination, co-extrusion. Between layers, an adhesive layer can be interposed as needed. In addition, there is no restriction | limiting in particular in the shaping | molding method of the lid | cover container and main body container of the sealing container of this invention, It can shape | mold by well-known vacuum molding, compression molding, and vacuum compression molding.

3 is an explanatory view of one embodiment of a sealing container of the present invention. The sealing container shown in this drawing consists of the flange part 1 and the convex part 9 in which the innermost layer was shape | molded by the multilayer sheet of two or more layers whose innermost layer of a main body container and resin which can be heat-sealed, A cover container 3 having a fitting portion 10 covered at the circumferential edge of the flange portion of the main body container at the circumferential edge thereof, and a main body container 5 having the flange portion 4. In the sealed container of this invention, after filling the main body container with the food 6, it fits by fitting the fitting part of the circumferential edge of the flange part of a cover container to the circumferential edge of the flange part of a main body container. By fitting the circumference of the flange portion of the lid container and the flange portion of the body container, positioning of the lid container is performed, and there is no fear that the lid container is displaced from the body container. The container is placed on the heat seal support 7 in this state, pressurized under constant conditions by the heat seal hot plate 8, and the flange part of the cover container is heated to thereby cover the cover container and the main body container with the flange part. Can be sealed by heat sealing. In addition, by appropriately selecting the material and heat-sealing conditions of the innermost layers of the lid container and the main body container, it is possible to provide the ease of opening that can be easily opened by a human hand without the need for tools. Can be. 4 is a cross-sectional view showing a state during opening of the sealing container of the present invention.

In general, the temperature of the heat seal hotplate is suitably 150 ° C. to 190 ° C., so that the outermost layer of the lid container has a melting point that is at least 10 ° C. or higher, preferably 20 ° C. or higher than the melting point of the resin of the innermost layer to be heated. It is desirable to have a polycarbonate that is excellent in heat resistance, but this condition is satisfied.

The sealing container of this invention can form the ridge part which fits with the bottom part of a main body container in the upper periphery of the convex part of a lid container. 5 is an explanatory view of a sealing container of the present invention having a ridge in a lid container. In this aspect, the ridge part 11 which fits with the bottom part of the main body container 5 is formed in the upper periphery of the convex part 9 of the lid container 3. When the sealing container of this aspect overlaps, the ridge | bulb part of a cover container and the bottom part of a main body container fit together, and it does not fall down, and can handle a large number of sealing containers easily.

The sealing container of this invention can form the recessed part which can be changed convexly by the internal pressure at the time of a heating at the bottom part of a main body container. Fig. 6 (a) is a plan view of the main body container of the sealing container of the present invention having a recessed portion at the bottom thereof, and Fig. 6 (b) is a cross-sectional view taken along line AA in a state where the flange portion of the lid container and the main body container is heat-sealed. 6 (c) is a cross-sectional view taken along line AA in the state where the concave portion deforms into a convex shape due to internal pressure during heating. In this embodiment, an elliptical recessed portion 12 is formed in the bottom of the main body container 5, so that the contents are filled, and the lid container and the main body container are heat-sealed at the flange portion. As shown in b), the concave portion maintains its original shape. When the sealed container filled with the contents is heated for sterilization of the contents, the inside of the sealed container becomes pressurized, but at this time, it is shown in FIG. As shown, the concave portion deforms into a convex shape, and the inner pressure of the sealed container is increased, so that the internal pressure can be reduced, thereby preventing peeling of the heat seal due to pressure and damage of the sealed container.

The sealing container of the present invention can form an opening tab in order to facilitate opening. Fig. 7 (a) is a plan view of a lid container of the sealing container of the present invention with an opening tab, and Fig. 7 (b) is a sectional view taken along line BB in a state where the flange portion of the lid container and the main body container is heat-sealed. . In this embodiment, the opening tab 13 is formed by widening one corner portion of the flange portion of the lid container and leaving the flange portion of the main body container and a portion which is not heat-sealed. When opening the sealing container, the sealing container can be easily opened by putting a finger on the opening tab and pushing the cover container upward. The position of the tear tab is not limited to the corner of the flange portion, and can be formed at any position.

The sealed container of the present invention can be opened and opened, and then the lid container can be opened and placed on a table as it is without being transferred to another container. If the material of the multi-layer sheet used is to withstand heating with a microwave oven, open it once, remove the cover container, and then cover the fitting of the cover container with the flange of the main body container, and heat it with a microwave oven to provide a meal. Can be.

Although an Example is given to the following and this invention is demonstrated in more detail, this invention is not limited at all by these Examples.

Example 1

The outermost layer is a polycarbonate having a thickness of 0.25 mm, and the innermost layer has a flange portion having a width of 6 mm with a fitting portion from a two-layer sheet of a mixed resin of polypropylene and polystyrene having a thickness of 0.05 mm, and the height of the convex portion is 10 mm. A cover container of a cone shape having a phosphorus diameter of 70 mm was formed by vacuum molding. Moreover, from the polypropylene sheet of thickness 0.8mm, the cone-shaped main body container of diameter 70mm which has a flange part of width 5mm and whose capacity is 200 ml and depth 50mm was shape | molded by vacuum molding.

The main body container was filled with 210 g of boiled vegetables containing 50 ml of the soup for flavoring food, and was fitted by fitting the fitting portion of the periphery of the flange portion of the cover container to the flange portion of the main container. The boiled stuffed vegetables exceeded the edge height of the main container and were visible through the cover container from the outside. Subsequently, as shown in Fig. 8, the flange portion of the container was placed on the heat seal support, and then a cylindrical heat seal hot plate having an outer diameter of 90 mm and an inner diameter of 73 mm heated to 190 ° C. was used to seal the cylinder with a cylinder diameter of 100 mm. The flange portion was pressed for 2.5 seconds at a pressure of 3.0 kg / cm 2. The convex portion of the lid container was able to be hermetically sealed by heat sealing without causing lower strain.

The sealed container filled with the boiled vegetables was sterilized at 98 ° C. for 30 minutes under a constant pressure of 1.3 kg / cm 2 at a constant pressure using a shower sterilizer, and then stored for 2 weeks in refrigeration. did. When serving a meal, the fit of the lid was peeled off with a finger so that it could be easily opened. Again, the cover container was fitted to the main body container and heated in a microwave oven to obtain boiled vegetables. The cover container was removed and placed on the table without being transferred to another container. However, the container did not feel uncomfortable, and the flavor of the boiled vegetables was delicious without any change after cooking.

Example 2

From the outermost layer, from a multilayer sheet having a thickness of 0.08 mm, a polycarbonate having a thickness of 0.1 mm, a polypropylene having a thickness of 0.1 mm, a polyvinylidene chloride having a thickness of 0.01 mm, a polypropylene having a thickness of 0.05 mm, and a mixed resin of high density polyethylene, The cover container which has the flange part of width 7mm with a fitting part, and the convex part is 80 mm long, 100 mm wide, and 10 mm high was shape | molded by vacuum molding. In addition, from the outermost layer, a plan of 5 mm in width from a 0.8 mm thick coextruded multi-layer sheet made of polypropylene having a thickness of 0.38 mm / ethylene-vinyl acetate copolymer soap sulphide having a thickness of 0.04 mm / a polypropylene having a thickness of 0.38 mm A main body container of a capacity of 200 ml, a length of 80 mm, a width of 100 mm, and a depth of 25 mm was formed by vacuum molding.

This main body container was filled with 250 g of Chikuzenza, and was fitted in the same manner as in Example 1 while fitting the fitting portion of the circumferential edge of the flange portion of the cover container to the flange portion of the main body container. Subsequently, the flange portion of the container was placed on the heat seal support, and then the flange portion was pressurized for 3 seconds at a pressure of 3.0 kg / cm 2 by a seal machine having a cylinder diameter of 100 mm by a heat seal hot plate heated to 190 ° C. The convex portion of the lid container was able to be completely sealed by heat sealing without causing lower strain.

The sealed container filled with this Chikuzenza was sterilized for 120 minutes at 120 degreeC under the pressure of 2.4 kg / cm <2> by adjusting to a constant pressure using a retort sterilization pot. After storing at room temperature for 2 weeks, the fitting portion of the lid container was peeled off with a finger, so that it could be easily opened. The taste of Chikuzenza did not change immediately after cooking.

Example 3

The lid container of the same shape as Example 2 was vacuum-pressured using the two-layer sheet | seat which the outermost layer same as Example 1 is a polycarbonate of 0.25 mm thickness, and an innermost layer is a mixed resin of polypropylene and polystyrene of thickness 0.05mm. It shape | molded by co-molding. 6 (a) which has the same flange part, the same length, width, and depth as Example 2, and has a concave portion having a depth of 7 mm in an elliptical shape having a long diameter of 70 mm and a short diameter of 50 mm at the bottom. The main body container of the shape was molded by vacuum pressure molding from a polypropylene sheet having a thickness of 0.8 mm as in Example 1.

The main body container was filled with 250 g of boiled vegetables containing 50 ml of the flavored soup, and was fitted while fitting the fitting portion of the periphery of the flange portion of the cover container to the flange portion of the main container. Subsequently, the flange portion of the container was placed on the heat seal support, and then the flange portion was pressed for 2.5 seconds at a pressure of 3.0 kg / cm 2 by a heat seal hot plate heated to 190 ° C. In the convex portion of the lid container, the container was completely sealed by heat-sealing without generating any lower strain, and the sealing container of the shape shown in Fig. 6 (b) could be obtained.

The sealed container filled with the boiled vegetables was heated at 98 ° C. for 10 minutes under a constant pressure of 1.0 kg / cm 2 using a shower sterilizer. The concave portion formed at the bottom of the container was deformed into a convex shape as shown in Fig. 6 (c) and sterilized while maintaining the sealing property.

Comparative Example 1

Operation similar to Example 3 was repeated except not providing a recessed part in the bottom part of a main body container.

When a shower sterilizer was used, heating was performed at 98 DEG C for 10 minutes at a constant pressure of 1.0 kg / cm &lt; 2 &gt;, whereby a part of the heat seal of the flange portion fell and the sealing property was lost.

The sealing container of the present invention can be filled with a large amount of contents, maintain a good sealing property by heat seal, and can be easily opened by a human hand.

Claims (6)

The outermost layer is polycarbonate, and the innermost layer is formed of a cover container having a flange portion and a convex portion, and a body container having a flange portion, formed of a multilayer container having two or more layers, the main body container and a resin capable of heat-sealing. A lid and fillable body in which the filling contents can be filled beyond the height of the main body container, and a fitting portion is formed at one edge of the flange portion to cover the other flange portion, and is heat-sealed and heat-sealed at the flange portion. Sealing container, characterized in that the ease of opening between the flange portion of the container. The innermost layer of the lid container is made of polypropylene, low density polyethylene, linear low density polyethylene, high density polyethylene, ethylene-vinyl acetate copolymer, polystyrene, acid-modified polyethylene, ethylene-methacrylic acid copolymer and ethylene-methacryl. Sealing container, characterized in that one or two or more mixtures selected from the acid copolymer polymer crosslinked material. The intermediate | middle layer of Claim 1 in which the said sealing container contains the laminated structure of polypropylene / (ethylene-vinyl acetate copolymer soap sulphide or polyvinylidene chloride) in order from an outer layer side between the outermost layer and the innermost layer. Sealing container, characterized in that it further comprises. The sealing container according to any one of claims 1 to 3, which is formed from a main body container and a three-layered sheet laminated in the order of polypropylene / ethylene-vinyl acetate copolymer soap sulphide / polypropylene. The sealing container according to any one of claims 1 to 3, wherein the lid container has a ridge that fits with a bottom portion of a main body container that is separate in the shape of an upper periphery of the convex portion. The sealing container according to any one of claims 1 to 3, wherein the main body container has a concave portion in the bottom portion which is convexly deformable by internal pressure during heating.