JPH0475553A - Packaged bdryx splendens - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a package of fresh red sea bream,
Specifically, the present invention relates to a packaged body of golden sea bream that has excellent fish meat freshness and color retention.

[Conventional technology]

Conventionally, meat tends to lose its freshness, and many studies have been conducted to improve its shelf life. For example, JP-A-58-138
No. 336 discloses a method of preventing alteration and deterioration of meat quality by storing meat at low temperature in a substantially oxygen-impermeable container together with an oxygen scavenger. However, the red color of lean meat fades in an atmosphere with low oxygen concentration, resulting in a decline in its commercial value.

In other words, it was not enough to prevent red meat from alteration due to bacteria and deterioration of meat quality; it was also necessary to maintain its color. JP-A-58158129 discloses a method of restoring the faded red color by preserving fish meat in a deoxidized state and then exposing it to the air.

However, in the case of golden sea bream, the inventor's research has revealed that this method does not restore the faded color. Japanese Patent Publication No. 6,129,688 discloses a method of maintaining fish meat at a high level by holding the fish meat in oxygen gas where the partial pressure of carbon dioxide gas is maintained at 0%.

However, since carbon dioxide gas reacts with moisture in food to form carbonic acid and exerts the effect of preventing the proliferation of microorganisms, this effect is lost if the partial pressure of carbon dioxide gas is reduced to 0%. This method only delayed the fading of the red color, but did not extend the effect of preserving the quality of fish meat.

In addition, in Japanese Patent Publication No. 63-23060, when packing with gas, the filling gas is 50 to 100% by volume.
However, the present inventors have found that in packages containing 50 to 100% by volume of carbon dioxide, the color of the metal mesh becomes white and fades. This was revealed through research.

In other words, the color and freshness of fish meat in the wire mesh are maintained! ! IN was unresolved.

[Problem to be solved by the invention]

An object of the present invention is to provide a package that maintains the color and freshness of the wire mesh, which was not possible with conventional packaging methods.

[Means for Solving the Problems] In order to solve the problems, the inventors of the present invention have made extensive studies and have found that a storage container made of gas barrier material and a mixed gas mainly composed of oxygen are sealed in a metal mesh packaging. This problem was solved and the present invention was finally completed.

That is, the present invention is applicable to gas-filled packaging of fresh metal mesh. Metal mesh packaging, characterized in that it is packaged using a packaging material with excellent gas barrier properties, and a mixed gas with an oxygen concentration of 90 to 99% and a carbon dioxide concentration of 1 to 10% is sealed and stored in the container. It is the body.

There are no restrictions on the form of the fresh metal mesh used in the present invention. Preferably, fresh wire mesh is used, with perishable parts such as the head, internal organs, and gills removed.

Examples of the synthetic resins having gas barrier properties used in the present invention include high nitrile resins, polycarbonate, ethylene-vinyl alcohol copolymers, polyester resins, and polyamide resins.

The high nitrile resin used in the present invention is a copolymer mainly composed of unsaturated nitrile such as acrylonitrile and methacrylonitrile, and contains 50 weight percent or more of unsaturated nitrile. Examples of monomers copolymerizable with unsaturated nitrile include styrene, butadiene, isoprene, methyl acrylate, ethyl acrylate, methyl methacrylate, and ethyl methacrylate, and one or more of these can be used. .

In addition, mixtures of rubber-like polymers such as butadiene-acrylonitrile copolymers, isoprene-acrylonitrile copolymers, butadiene-styrene copolymers, polybutadiene, polyisoprene, etc. and copolymers mainly composed of unsaturated nitriles, and copolymers of these It is also possible to use a product obtained by graft polymerizing an unsaturated nitrile and the above copolymerizable monomer in the presence of a rubbery polymer.

The container of the present invention is manufactured by obtaining a sheet of the above-mentioned resin by a conventional extrusion molding method, calendar molding method, inflation molding method, etc., and then vacuum forming or pressure forming the sheet. High nitrile resin, polycarbonate resin and polyester resin have excellent heat sealability and can be used alone. The ethylene-vinyl alcohol copolymer needs to be made into a multilayer F*a with other resins having excellent heat sealability. When these sorts are molded into a container shape, ethylene-vinyl alcohol copolymer, polycarbonate resin, and polyester resin have poor moldability, and the resin layer becomes partially thin, reducing the gas barrier properties of the container after molding. This should be checked.

High nitrile resins are more preferred in terms of workability and yield.

The thickness of the container made of a synthetic resin having gas barrier properties used in the present invention is determined by the required gas barrier properties and rigidity. For example, in the case of high nitrile resin, 0.1 to 0. hm is preferred, and 0. If it is less than Lwm, gas barrier properties and rigidity will be insufficient, which is not preferable. On the other hand, it is possible to exceed 0.8 mm, but this will only result in poor workability and increase in cost.

Examples of the shape of the package used in the present invention include containers, bags, and the like.

The top film (lid) of the container in the present invention includes:
A single layer film of a high nitrile resin, a polycarbonate resin or a polyester resin, or a multilayer film obtained by laminating the above single layer film or an ethylene-vinyl alcohol copolymer film on a film made of another thermoplastic resin can be used. The top film is sealed to the container body using the usual heat sealing method, impulse sealing method, etc. The film can also be printed if necessary to increase the commercial value of the package.

The mixed gas composition for preserving the gold grid used in the present invention is an atmosphere with an oxygen concentration of 90 to 99% and a carbon dioxide concentration of 1 to 10%. When the oxygen concentration is less than 90%, discoloration, occurrence of fishy odor, and softening of the flesh are noticeable. If the carbon dioxide concentration is less than 1%, the effect of preventing the growth of microorganisms due to the carbonic acid formed by the carbon dioxide gas cannot be expected.

Also, when the carbon dioxide concentration reaches 10%, the oxygen concentration increases to 90%.
%, resulting in significant discoloration, fishy odor, and softening of the meat.

Mixed gas components other than oxygen and carbon dioxide include nitrogen,
Inert gases such as helium, neon, argon, krypton, and xenon are preferably used.

[Effect]

An example of implementation of the present invention will be described based on the drawings.

FIGS. 1 and 2 are cross-sectional views of the gold grid package of the present invention. The Kinme vN1 is placed in a container 2 made of a synthetic resin with excellent gas barrier properties using a top film 3, or the fillet 4 of the Kinme row is placed in a bag 5 made of a synthetic resin with excellent gas barrier properties, containing 90% or more oxygen. By storing and sealing in an atmosphere containing carbon dioxide gas of 5% or more, it is possible to prevent a decrease in the flesh color and freshness of the gold grain rows.

〔Example〕

The present invention will be explained below using examples.

Production Example 1 A sheet with a thickness of 300 μm was obtained by extrusion molding using Valex (trade name, manufactured by Mitsui Toatsu Chemical ■) as a high nitrile resin. The obtained sheet was vacuum formed to have a capacity of 50
A container of 0d was obtained.

Production Example 2 Using the same high nitrile resin as Production Example 1, a film with a thickness of 40 am was obtained by inflation molding.

Production Example 3 The film obtained in Production Example 2 was processed into a bag by a known method to obtain a bag with a capacity of 500 d.

Example 1 A metal grid was placed in the container obtained in Production Example 1, and 95% oxygen was added.
The film obtained in Production Example 2 was heat-sealed and sealed with a mixed gas containing 5% carbon dioxide as a top film, and stored at 2°C for 14 days. Sensory evaluations such as changes in flesh color, odor, and taste were conducted. The results are shown in Table 1.

Example 2 Example 1 was repeated except that a gas mixture of 90% oxygen, 5% carbon dioxide and 5% nitrogen gas was used.

The results are shown in Table 1.

Example 3 Example 1 was repeated except that the bag obtained in Preparation Example 3 was used. The results are shown in Table 1.

Comparative Example 1 Example I was repeated except using 50% oxygen and 50% nitrogen. The results are shown in Table 1.

Comparative Example 2 Example 1 was repeated except that it was sealed together with the deoxidizing side. The results are shown in Table 1. In addition, when the gold grain rows that had faded in color were left in the air, the flesh color did not recover.

Comparative Example 3 Example 1 was repeated except that a mixed gas of 50% oxygen and 50% carbon dioxide was used. The results are shown in Table 1.

Comparative Example 4 Example 1 was repeated except that a mixed gas of 95% oxygen and 5% nitrogen was used. The results are shown in Table 1.

Comparative Example 5 Example 3 was repeated except that a polyethylene bag was used instead of the high nitrile resin bag. The results are shown in Table 1.

Table 1 In the diagram 1: Golden sea bream 2: Container 3 Nidonobu film 4: Kinmedai fillets 5: Bag 6: Heat seal part It is.

[Effects of the Invention] The golden sea bream package of the present invention has extremely good flesh color retention and freshness retention properties, making it possible to store highly fresh golden sea bream for a long period of time, and providing consumers with good taste. This makes it possible to provide golden sea bream with excellent freshness, which will greatly contribute to the distribution and sales of food products.

[Brief explanation of drawings]

FIG. 1 and FIG. 2 are cross-sectional views showing an example of the golden sea bream package of the present invention.

Claims (2)

[Claims] 1. When gas-filling and packaging fresh red sea bream, it is packaged using packaging material with excellent gas barrier properties, and a mixed gas with an oxygen concentration of 90 to 99% and a carbon dioxide concentration of 1 to 10% is sealed inside the container. A kinmedai package characterized by being stored in a container. 2. The golden sea bream package according to claim 1, wherein the container having excellent gas barrier properties is a container made of a high nitrile resin, which is a copolymer containing 50% by weight or more of unsaturated nitrile.