JPH01294472A - Package - Google Patents

Abstract

PURPOSE:To obtain a package capable of preserving food for a long period of time, by hermetically sealing a plastic container containing content subjected to retort of boil sterilization in a metal-containing bag and evacuating the bag or replacing the gas in the bag with inert gas. CONSTITUTION:A plastic container 1 has heat resistance withstanding retort or boil sterilization and a lid material 2 also has similar heat resistance withstanding retort or boil sterilization. After the container 1 is filled with content A, the packed container A is sterilized by retort or boil sterilization. Next, the plastic container containing the sterilized content is inserted in a bag 3 containing a metal and, thereafter, the bag 3 is subjected to vacuum packing or to perfect gas replacing packing using inert gas such as carbon dioxide or a gaseous mixture of nitrogen and carbon dioxide. The bag 3 is constituted so as to perfectly block gas or moisture deteriorating the preservability of the content A such as oxygen gas. A package having preservability can be obtained, and the lack of the degree of freedom of a design and high cost of a metal can be solved by the low cost and easy moldability of plastic.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a package that allows food to be stored for a long period of time.

(Prior art) Conventionally, as packaging forms for foods that require long-term storage, metal cans made of tinplate, A1, etc., bags made of multilayer film containing A1 foil, etc. have been used after retort sterilization or boil sterilization. However, in the case of the former, there are problems such as high cost, freedom of design, and freedom of printing, and disadvantages in terms of equipment such as the need for a large-scale sealing machine to wrap and tighten the lid material. In the latter case, there is a problem in the shape retention of the contents due to the manufacturing form, and there are problems such as the fact that it can only be used for limited contents. Recently, cold-processed containers made by laminating metal such as tin plate between plastic sheets are being adopted, and although the sealing equipment for the lid material has been simplified, they are still expensive and require less freedom in design than metal cans. Due to drawbacks such as lack of printing freedom, it has not been widely adopted.

In order to solve these problems, plastic containers with various barrier properties are being considered, but although they offer greater freedom in design and cost, they are significantly less durable than metal materials in terms of content preservation. Because of the difference in storage properties, it is not suitable for long-term storage and is only used for low-temperature distribution products or short-term storage foods.

(Problems to be Solved by the Invention) The present invention was developed as a result of studies to improve the drawbacks of metal cans, plastic cans containing metal, and bags containing metal foil, which have been used for foods that require long-term storage. , even in heat-resistant plastic containers that can withstand boil sterilization.
It has been discovered that by using laminated bags containing metal foil such as L, food can be stored for a long period of time equivalent to that of metal cans, and it is also cheaper, has more flexibility in container design, and has improved printing efficiency. The purpose of the present invention is to provide a packaging body that can be freely attached to a container.

(Means for Solving the Problems) The present invention includes a plastic container containing retort sterilized or boil sterilized contents sealed with a bag containing metal such as A1, and the inside of the bag is replaced with vacuum or inert gas. This is a package characterized by:

(Function) The plastic container (1) used in the present invention may be any heat-resistant container that can withstand retort sterilization and boil sterilization. - Polypropylene, polycarbonate, heat-resistant polyester, etc. are used for boat fishing. A laminate material containing polyethylene resin, saponified ethylene-vinyl acetate copolymer, polyvinylidene chloride, etc. may also be used if necessary.

In addition, the lid material (2) of the container (1) has heat resistance that can withstand retort sterilization and boil sterilization like the container.
) Any material that can be sealed can be used; generally OPP/PE, PET/Al/PP, PET/K
OP/Easy Peel Sealant etc. are used. After filling the container (1) with the contents (A), the container is sealed with the container (2) and then sterilized by retort sterilization, boiling sterilization, or the like. Next, the plastic container containing the sterilized contents is
After being inserted into a bag (3) containing a metal such as L, the bag (3) is vacuum packed or the inside of the bag (3) is completely replaced with an inert gas such as carbon dioxide, nitrogen gas, or a mixed gas of carbon dioxide and nitrogen gas.

The bag (3) is made of a material containing metal such as A1, for example, OPP/A.
It is possible to adopt l/PE, PET/Al/PP, etc.

However, the bag (3) must be configured to completely block out gases such as oxygen gas, moisture, etc., which deteriorate the storage stability of the contents (A).

(Example 1) A 150 cc container formed from a 0.8 mm thick PP/PVDC/PP sheet was filled with seasoned horsemeat, and the OP
After completely sealing with P / N y / Easy Beer Sealant lid material and retorting sterilization at 120℃ for 30 minutes, it was inserted into a PET / Al / PE bag, vacuum packed, and left at room temperature. Even after 1 year. The contents remained unchanged and could be stored.

(Example 2) A container with a design having two pockets as shown in Fig. 2 was obtained from a PP sheet with a thickness of 0.8 mm, cooked rice was placed in one pocket (A), and rice was placed in the other pocket (B). Fill with curry roux, completely seal with PET10Ny/easy peel sealant material (2), and heat at 125°C for 20 minutes.
After retort sterilization for a minute, insert it into an OPP/Al/PE bag, completely replace the inside of the bag with nitrogen gas, seal it, and leave it at room temperature for 1.5 years. After 1.5 years, open the bag, take out the container, and microwave it. When heated, it can be eaten without any change from when it was filled.

(Effects of the Invention) The packaging according to the present invention has the same shelf life as metal cans made of tinplate, Al, etc., which have been adopted as conventional packaging forms for long-term storage. The disadvantages of metal cans, such as lack of freedom in design and high cost, can now be overcome with the low cost and easy moldability of plastic. Regarding the ease of opening container lids, in the case of metal cans, in order to make them easy to open, it is necessary to wrap the lid with a sol-top lid, and there are restrictions on the price and shape of the lid, whereas plastic cans In the case of containers, it is now possible to freely heat seal the lid material that allows easy beer.

BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1 and 2 are cross-sectional views showing embodiments of the packaging body of the present invention.

Claims (1)

[Claims] (1) Packaging characterized in that a plastic container containing retort sterilized or boil sterilized contents is sealed in a bag containing metal such as Al, and the inside of the bag is replaced with vacuum or inert gas. body.