JP2001169719A - Method for storing frozen meat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for storing frozen meat, capable of retaining qualities such as color tone and texture and suppressing reduction of product weight followed by thawing even when meat such as tuna meat or beef cut into a prescribed size is frozen and freezing at <=-20 deg.C is carried out for about two months. SOLUTION: This method for storing frozen meat comprises a cutting step for cutting frozen meat of tuna, beef, and the like, into a prescribed size, a quick freezing step for quickly freezing the meat cut into the prescribed size in the cut step by using liquid nitrogen or liquefied carbon dioxide, a packaging step for packaging a prescribed amount of quickly frozen meat, oxygen and an inert gas in an amount of <=40% based on the packed amount of the oxygen into a packaging bag having gas barrier property, and a freezing step for freezing the packaged body at <=-20 deg.C after packaging step.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for preserving frozen meat, which allows frozen tuna or beef to be preserved for sale to consumers.

[0002]

2. Description of the Related Art Conventionally, crucible-shaped frozen tuna has been stored in a freezer at -40.degree. C. to -60.degree.

[0003]

Conventionally, -40.degree. C. to -6.
If the frozen tuna is not stored in a freezer at 0 ° C., the quality will be remarkably deteriorated. Therefore, without such a freezer, there is a disadvantage that frozen tuna for several days cannot be purchased.

The present invention has been made in view of the above-mentioned conventional drawbacks,
Frozen meat such as tuna and beef cut to a predetermined size, keep the color tone and texture etc. quality even after 2 months of frozen storage at -20 ° C or less, and reduce the product weight due to thawing. It is an object of the present invention to provide a method for storing frozen meat that can be suppressed.

The above and other objects and novel features of the present invention will become more completely apparent when the following description is read in conjunction with the accompanying drawings. However, the drawings are for explanation only, and do not limit the technical scope of the present invention.

[0006]

In order to achieve the above object, the present invention provides a cutting step for cutting frozen and preserved meat such as tuna and beef into a predetermined size, and a predetermined step in this cutting step. A quick freezing step of rapidly freezing the frozen meat stored in a cut size using liquefied nitrogen or liquefied carbon dioxide. A method of storing frozen meat comprises a packaging step of filling and sealing a gas barrier packaging bag with an inert gas of 40% or less, and a freezing storage step of freezing and storing the packaging at -20 ° C or less after this packaging step. are doing.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the drawings.

In the first embodiment of the present invention shown in FIGS. 1 to 6, reference numeral 1 denotes a thawing step of thawing frozen tuna 2 as meat, which is formed into a crucible and stored frozen. In the thawing step 1, as shown in FIG.
Thawing apparatus 5 using the thawing method of frozen seafood of No. 47389
Then, the frozen tuna 2 is brought into contact with warm salt water 3 having a salt concentration of 3.0% by weight or more at 30 ° C. to 50 ° C., and the temperature of the core of the frozen tuna 2 is raised to the maximum ice crystal formation zone temperature. After that, the frozen tuna 2 is brought into contact with cold salt water 4 having a salt concentration of 3.5% by weight or less and a temperature in the range of -3 ° C to + 10 ° C to lower the temperature of each part of the frozen tuna 2 by-
Thaw to converge between 3 ° C and + 10 ° C.

6 is a cutting step for cutting the sac-shaped tuna 2A thawed in the thawing step 1 to the size of a sushi roll or sashimi as shown in FIG. The cut tuna 2B is arranged obliquely on the tray 7 and overlapped.

Reference numeral 8 denotes a quick freezing step in which the cut tuna 2B cut in the above cutting step 6 is rapidly frozen by cryomaster freezing using liquefied nitrogen or liquefied carbonic acid as shown in FIG. It maintains the quality of the cut tuna 2C and prevents the cut tuna 2C from sticking to each other.

Reference numeral 9 denotes a predetermined amount of cut tuna 2C rapidly frozen in the quick freezing step 8 in which 60 to 100% of oxygen and inert gas such as carbon dioxide, nitrogen, argon, helium, and neon are added as shown in FIG. In the packaging process of cut tuna, which is filled with 40 to 0% of gas in the gas barrier packaging bag 10 and hermetically closed, several types of cut tuna packaging process 9 having different storage amounts of the cut tuna 2C are made.

At step 11, after the cut tuna packaging step 9, as shown in FIG.
In the freezing and preserving step of freezing and preserving at or below ℃, the freezing and preserving step 11 is performed using not only a freezer at −40 ° C. to −60 ° C. but also a freezer that is widely used.

The cut tuna 2C processed by the above-mentioned method for storing frozen meat has a packing bag 10 filled with oxygen and an inert gas, so that the quality such as color tone and texture can be maintained. By using a saline solution for thawing, an appropriate amount of water in the tissue is removed at the time of thawing, and the destruction of the tissue due to expansion of the ice crystals at the time of refreezing is suppressed, and the quality can be maintained for about two months. When used, the thawing is performed by thawing in a refrigerator or natural thawing as well as the thawing in the thawing step 1.

[0014]

Next, different embodiments of the present invention shown in FIGS. 7 to 16 will be described. In addition,
In the description of the different embodiments of the present invention, the same components as those in the first embodiment of the present invention are denoted by the same reference numerals, and redundant description will be omitted.

The second embodiment of the present invention shown in FIGS. 7 to 9 is mainly different from the first embodiment of the present invention in that the salt concentration is 6.5 at 40.degree. After being immersed for about 1 水 2 and a half minutes in 3% by weight of warm salt water 3A,
C. to + 10.degree. C., soaked in cold salt water 4A having a salt concentration of 0.8% by weight for about 1 to 2 and a half minutes, and thawed so that the temperature of each part of the frozen tuna converges between -5.degree. In the same manner as the first embodiment of the present invention, even when such a meat preservation method is used, the quick freezing step 8A of quick freezing using liquid nitrogen is performed while using the thawing step 1A to perform Various effects can be obtained.

The third embodiment of the present invention shown in FIGS. 10 to 12 is different from the first embodiment of the present invention mainly in a thawing step 1B for thawing frozen beef 13.
And the cutting step 6A of cutting the beef 13A thawed in the thawing step 1B into the steak size 13a, the first method of the present invention can be achieved by using such a method of storing frozen meat. The same operation and effect as the embodiment can be obtained.

The fourth embodiment of the present invention shown in FIGS. 13 and 14 is different from the first embodiment of the present invention mainly in that raw tuna 14 is reduced to a predetermined size 14a.
With the use of such a method for storing frozen meat, the same operation and effect as those of the first embodiment of the present invention can be obtained in that the cutting step 6 for cutting into a piece is used.

The fifth embodiment of the present invention shown in FIGS. 15 and 16 is different from the third embodiment of the present invention mainly in that raw beef 15 is cut into a predetermined size 15a. The same effect as the third embodiment of the present invention can be obtained by using such a method for storing frozen meat in that the cutting step 6A is performed.

In each of the embodiments of the present invention, a method for preserving tuna and beef has been described. However, the present invention is not limited to this, and the same applies to other fish meat and animal meat such as pigs and sheep. Can be saved in a way.

[0020]

As apparent from the above description, the following effects can be obtained in the present invention.

(1) A cutting step of cutting frozen and preserved meat such as tuna and beef into a predetermined size, and a frozen and preserved meat cut into a predetermined size in this cutting step. A quick freezing step of quick freezing using liquefied nitrogen or liquefied carbon dioxide, and a predetermined amount of frozen meat that has been quickly frozen is charged with oxygen, and an inert gas of 40% or less based on the filled amount of oxygen is contained in a gas barrier packaging bag. And a frozen preservation step of freezing and preserving the packaging at −20 ° C. or lower after the packaging step, so that the frozen frozen meat cut to a predetermined size is subjected to oxygen, It is sealed in a gas barrier packaging bag filled with an inert gas of 40% or less with respect to the amount of oxygen, and preserves frozen meat at -20 ° C or less for about 2 months under the quality such as color and texture of frozen meat. It even can be held. Therefore, freezing and preservation in a commonly used freezer is possible, and the distribution of goods can be performed efficiently.

(2) According to the above (1), the frozen meat is sealed in the gas barrier packaging bag, so that the frozen meat can be reliably prevented from being contaminated from the outside during the distribution process.

(3) According to the above (1), frozen storage in a freezer at ordinary households is also possible, so that foods stored at ordinary households can be obtained.

(4) Claims 2 and 3 are also the above (1) to (3).
The same effect can be obtained.

[Brief description of the drawings]

FIG. 1 is a process chart of a first embodiment of the present invention.

FIG. 2 is an explanatory diagram of a thawing process of frozen tuna according to the first embodiment of the present invention.

FIG. 3 is an explanatory diagram of a cutting step according to the first embodiment of the present invention.

FIG. 4 is an explanatory diagram of a quick freezing step according to the first embodiment of the present invention.

FIG. 5 is an explanatory view of a packaging process of cut tuna according to the first embodiment of the present invention.

FIG. 6 is an explanatory diagram of a frozen storage step according to the first embodiment of the present invention.

FIG. 7 is a process chart of a second embodiment of the present invention.

FIG. 8 is an explanatory diagram of a thawing process of frozen tuna according to the second embodiment of the present invention.

FIG. 9 is an explanatory diagram of a quick freezing step according to the second embodiment of the present invention.

FIG. 10 is a process chart of a third embodiment of the present invention.

FIG. 11 is an explanatory view of a defrosting step according to the third embodiment of the present invention.

FIG. 12 is an explanatory diagram of a cutting step according to the third embodiment of the present invention.

FIG. 13 is a process chart of the fourth embodiment of the present invention.

FIG. 14 is an explanatory diagram of a cutting step according to a fourth embodiment of the present invention.

FIG. 15 is a process chart of a fifth embodiment of the present invention.

FIG. 16 is an explanatory diagram of a cutting step according to the fifth embodiment of the present invention.

[Description of Signs] 1, 1A, 1B: thawing step, 2: frozen tuna,
3, 3A: warm salt water, 4, 4A: cold salt water, 5: thawing device, 6, 6A: cutting process, 7: tray, 8, 8
A: Quick freezing process, 9: Cut tuna packaging process, 1
0: Packaging bag, 11: Frozen storage process, 12: Packaging of cut tuna, 13: Frozen beef, 14: Raw tuna, 15: Raw beef.

Continuing from the front page (72) Inventor Kazutoshi Watanabe 7-1, Ogimachi, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture Inside (Showa Carbon Acid Co., Ltd.) In development

Claims (3)

[Claims] 1. A cutting step of cutting frozen and preserved meat such as tuna and beef into a predetermined size, and liquefying frozen and preserved meat cut into a predetermined size in the cutting step. A quick freezing process of quick freezing using nitrogen or liquefied carbon dioxide, and oxygen in the quick frozen predetermined amount of frozen meat, and an inert gas of 40% or less based on the charged amount of oxygen in a gas barrier packaging bag. A method for preserving frozen meat, comprising a packaging step of filling and sealing, and a freezing preservation step of freezing and preserving the packaging at −20 ° C. or lower after the packaging step. 2. A cutting step of cutting frozen and preserved meat such as tuna and beef into a predetermined size, and a step of cutting the frozen and preserved meat cut in this cutting step into liquefied nitrogen or liquefied carbon dioxide. A quick freezing step of quick freezing by cryomaster freezing to be used, and 60 to 100% of oxygen and 40 to 0% of an inert gas of carbon dioxide are added to a predetermined amount of frozen meat which is quick frozen in the quick freezing step. A method for storing frozen meat, comprising: a packaging step of filling and sealing a packaging bag; and a freezing storage step of freezing and storing the packaging at -20 ° C or lower after the packaging step. 3. The method for storing frozen meat according to claim 1, wherein the frozen meat such as tuna and beef is obtained by thawing the frozen meat.