JPS6121077A - Preservation of food - Google Patents

Abstract

PURPOSE:To prevent the degradation of a food caused by true fungi, by sealing a food in an impermeable container together with a disoxidation agent and optionally a CO2-absorbent or an alcohol generating agent, and keeping the oxygen concentration in the container below a specific level. CONSTITUTION:A food is sealed in an impermeable container together with a disoxidation agent (e.g. iron powder, ascorbic acid, etc.), or a disoxidation agent and a CO2 absorbent (e.g. zeolite impregnated with calcium hydroxide), or a disoxidation agent and an alcohol generating agent (e.g. zeolite impregnated with ethyl alcohol). The growth of true fungi can be suppressed and the food can be stored safely by keeping the oxygen concentration in the container to <=10ppm. When the oxygen concentration in the container is maintained to <=10ppm only by the use of a disoxidation agent, it is necessary to substitute the container with an inert gas and packaging the container with double packages, or to use the disoxidation agent in large excess.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical field to which the invention pertains] The present invention relates to a method for preserving food. More specifically, foods are sealed in a non-ventilated container together with an oxygen absorber, an oxygen absorber and a carbon dioxide gas absorber, or an oxygen absorber and an alcohol generator, and the oxygen concentration inside the container is maintained at 10 ppm or less. This invention relates to a method for preserving.

[Prior art and its problems]

In recent years, oxygen scavengers have come to be widely used as quality or freshness preserving agents for foods because they have effects such as preventing the growth of mold in foods, preventing oxidation of fats and oils, and preventing discoloration of foods.

In this case, the method of use is to simply seal the food together with an oxygen absorber in a container with relatively low oxygen permeability, and store the food with the oxygen concentration in the container below 0.1% (1000 ppm). there were.

Deterioration of foods is mainly caused by the proliferation of microorganisms, and most of these microorganisms are facultative anaerobes.
Since growth is possible under both aerobic and anaerobic conditions, conventional methods of using oxygen scavengers have been insufficient in suppressing the growth of microorganisms.

The present inventors conducted extensive research on microorganisms that cause food deterioration and the influence of oxygen, and found that they belong to facultative anaerobes.
It is known that it can grow even under nitrogen gas replacement anaerobic conditions.
Mucol sp., Fusari, a type of mold whose growth cannot be stopped by keeping it under anaerobic conditions.
uw sp, +Ar-thrinium sp, and Saccharomy-ces cer, a type of yeast.
evisiae, Candida utilis, Ha
nsenula aromala, Sacchar
omyces rouxii,) lansenula
m1so, Candida albicans+Pic
hia ohmeri, 5chizosacchar.

myces versatilis + Torulops
is coliculosa and other fungi do not grow under completely anaerobic conditions, and furthermore, the oxygen concentration of the atmosphere is 1o
It has been found that the growth does not occur when the concentration is kept below ppm. Furthermore, pvC-PVdC copolymer laminate film bags (K
As a result of investigating the cause of the growth of the above-mentioned fungi when sealed with an oxygen absorber in a film (OP/PE5KON/PE, etc.), we found that although these films are non-breathable,
/rrr day (20℃) of oxygen permeates, so the oxygen concentration in the atmosphere inside the container does not fall below 50 ppm.
As a result, the present invention was completed based on the discovery that the growth of these fungi cannot be inhibited by deoxygenation to this level of oxygen concentration.

[Purpose of the invention]

The present invention aims to prevent food spoilage caused by fungi, which has been impossible in the past, by using an oxygen absorber.

[Summary of the invention]

The present invention seals foods together with an oxygen absorber, an oxygen absorber and a carbon dioxide absorbent, an oxygen absorber and an alcohol generating agent, an oxygen absorber and other quality preserving agents in a non-ventilated container,
This invention relates to a method for preserving food by maintaining the oxygen concentration in a container at 1 oppm or less.

In the present invention, the method of keeping the oxygen concentration in the atmosphere inside the storage container below 1Qppm using an oxygen absorber is as follows: A method in which the agent and the alcohol generating agent are sealed together in a container (a) with a high gas barrier property, and the container (a) is sealed together with an oxygen scavenger in a container (b) with a high gas barrier property.

(2) Seal the food together with an oxygen absorber in a container (a) with a high gas barrier property that has been replaced with carbon dioxide gas or an inert gas, and convert this container (a) together with the oxygen absorber into a container with a high gas barrier property (b). How to seal inside.

(3) Foods are combined with oxygen absorbers, oxygen absorbers and carbon dioxide absorbers, or oxygen absorbers and alcohol generators with an oxygen permeability of lee/n (days (20'c) or less, preferably Occ/nf). A method of sealing a container with ultra-high gas barrier properties at 20°C.

(4) A method of sealing food in a container with high gas barrier properties together with a large excess of oxygen scavenger, which is more than 5 times the nominal usage amount. For example, when the food is packaged, the amount of air in the packaging container is 50%
In the case of 0 cc, when using the oxygen scavenger AGELESS 5400 (nominal usage amount: 100) manufactured by Mitsubishi Gas Chemical Co., Ltd., use 5 or more.

The following methods are adopted.

In the present invention, as the oxygen scavenger, iron or other metal powder,
The main ingredients are organic compounds such as hydroquinone, catechol, or ascorbic acid, and reducing sulfur compounds such as sulfites and dithionites, and include oxygen absorption types, carbon dioxide generation oxygen absorption types, and carbon dioxide absorption types. Oxygen absorbing type or alcohol generating oxygen absorbing type oxygen scavengers packaged in breathable packaging materials are usually used.

Further, as the carbon dioxide absorbent, a single alkali metal or alkaline earth metal hydroxide, or a carrier impregnated with the hydroxide and packaged with an air-permeable packaging material are used. In this case, the carrier used is what is generally called a filler, such as vegetable fibers such as pulp and paper, silica, zeolite, perlite, talc, and crushed minerals.

Examples of alcohol generating agents include those obtained by impregnating ethyl alcohol into vegetable fibers such as paper, pulp, thread, and cloth, porous inorganic materials such as silica and zeolite, or carriers with alcohol retention properties such as starch; , these are further packaged with a packaging material having air permeability. These alcohol generating agents generate gaseous alcohol, and specifically, in the present invention, which corresponds to, for example, an alcohol generating freshness preserving agent, a container with a high gas barrier property is one having an oxygen permeability of 100 m1. /+r
f days (20°C) or less, preferably 50...1/rd
day (20°C) or below. Specifically, KOP/PE, K
OP/CP.

KON/PE, KON/CP, KPET/PE, KP
The amount of oxygen permeated through bags, bottles, hooks, etc. made with ET/CP, etc., and the opening/closing parts is 100ml/lr.
Of course, glass or ceramic bottles, metal cans, etc., which are suitable for temperatures below d days (20° C.), can also be used.

In addition, a method (11, (
When used in accordance with 2), container (a) and container (b)
They may be the same, or they may be used in completely different combinations. The amount of oxygen permeated through bottles, boxes, etc., opening/closing parts, etc. made of vapor-deposited PET/PR, aluminum foil/PE, ON/aluminum foil/PE, PET/aluminum foil/PE, OV/PE, etc. is 1 m1/- Of course, it is also possible to use glass or ceramic bottles, metal cans, etc. that are suitable for temperatures below 20°C.

Note that it is also possible to use a container with a super high gas barrier property instead of a container with a high gas barrier property.

In the present invention, the oxygen concentration inside the container is measured using a Shimadzu Gas Chroma I/Graph GC-8A.
000mm molecular sieve 5A column, detector TC
It was determined by gas chromatography under the following conditions: O, column temperature 45"C, and carrier gas Ar%. In this measurement method, special precautions are taken to prevent oxygen from entering the air, especially during gas sampling. Therefore, the sampling ceiling was sufficiently replaced with Ar gas in advance, and the inside of the gas ceiling was kept under pressure at all times, and the operations from replacing the sampling ceiling with Ar to measurement were completed in as short a time as possible.

[Embodiments of the invention]

The present invention will be explained in more detail with reference to Examples below.

Example 1 100g of kneaded bean paste was placed in a KOP/PE bag (11
sealed in. Furthermore, this bag along with an oxygen absorber, KOP/
Seal it in a PE bag (2) and leave it in a room at 25°C and 50 to 60% RH.
, 02%), appearance and flavor were examined.

Comparative Example 1 100g of kneaded bean paste was mixed with an oxygen absorber (Ageless S-100,
Mitsubishi Gas Chemical Co., Ltd.) and KOP/PE bags
(Example 1). It was stored under the same conditions.

Comparative Example 2 100 g of kneaded bean paste was sealed in a KOP/PR bag without adding an oxygen absorber and stored under the same conditions as in Example 1 without double packaging for comparison.

Example 2゜100g of kneaded bean paste was mixed with an oxygen absorber (Ageless S-100,
Mitsubishi Gas Chemical Co., Ltd.) and a carbon dioxide absorbent (Ageless C-500) were sealed in a KOP/PE bag +11, and this bag was further sealed together with an oxygen absorber (Ageless S-100).
Sealed in a KOP/PE bag (2) and prepared as in Example 1. It was stored under the same conditions.

Example 3゜100g of kneaded bean paste was mixed with an oxygen absorber (Ageless S-100,
(manufactured by Mitsubishi Gas Chemical Co., Ltd.) and an alcohol-generating quality preservative (2g product, manufactured by Freund), as well as KOP/PE.
The bag (1) was sealed, and this bag was further sealed in a KOP/PE bag (2) together with an oxygen absorber (Ageless S-100>), and stored under the same conditions as in Example 1.

Example 4 100 g of kneaded bean paste and an oxygen absorber (Ageless S-50) were placed in a KOP/PE bag +11, and the bag was purged with nitrogen gas and then sealed. Add this bag to an oxygen absorber (Ageless S-100)
) and sealed in a KOP/PE bag (2), Example 1
．． It was stored under the same conditions.

Example 5 100 g of kneaded bean paste and a carbon dioxide gas-generating oxygen absorber (Ageless G-100) were sealed in a KOP/PE bag (1), and this bag was further packed with an oxygen absorber (Ageless S-100).
It was sealed in a KOP/PR bag (2), and Example 1. It was stored under the same conditions.

The results of the storage test are shown in Table 1.

Example 6゜100g of raw bread crumbs was added to oxygen absorber (Ageless S-100)
Together with this, it was sealed in a K OP/PE bag (2). This bag is further combined with an oxygen absorber (Ageless S-100).
Seal in KOP/PE bag (2) at 25℃, RH50-60
% in a room, and the gas composition (C
O2,02), appearance, and flavor were examined.

Comparative example 3゜100g of raw bread crumbs was added to oxygen absorber (Ageless S-100)
At the same time, the samples were sealed in a KOP/PE bag (2) and stored under the same conditions as in Example 6 without being double wrapped.

Comparative Example 4 100 g of fresh bread crumbs were sealed in a KOP/PE bag without adding an oxygen absorber and stored under the same conditions as in Example 6 without double packaging for comparison.

Example 7゜100g of fresh bread crumbs was added to an oxygen absorber (Ageless S-100)
and an alcohol-generating quality preservative (2 1g products, manufactured by Freund) in a KOP/PE bag, and then put this bag in a KOP bag with an oxygen absorber (Ageless S-100).
/ It was sealed in a PE bag and stored under the same conditions as Example 6.

Example 8゜100g of fresh bread crumbs was added to an oxygen absorber (Ageless S-100)
It was also sealed in an aluminum-deposited PET/PE bag and stored under the same conditions as in Example 6 without double packaging.

Table 2 shows the results of the storage tests for Examples 6 to 8 and Comparative Examples 3.4.

Procedural amendment (spontaneous) August 20, 1980 Patent Application No. 142787 2, Name of invention Method for preserving food 3, Relationship with the person making the amendment Case Patent applicant address 2 Marunouchi, Chiyoda-ku, Tokyo Chome 5-2 Name Mitsubishi Gas Chemical Co., Ltd. Representative Nagano Kasho 4 Agent address 2-5-2 Marunouchi, Chiyoda-ku, Tokyo Specification 6 Contents of amendment Amended to ``In this case.''

(2) rM on page 2 of the specification, 2nd line from the bottom to 1st line from the bottom
rM ucol A+Saccharomy-cesJ
ucor Sp, +Fusarium Sp, ^rth
rinium sp, and Sacch, a type of yeast.
aromyces J. (3) raromala J on page 3, line 1 to line 2 of the specification is corrected as ranomyces J.
Correct as ala J.

(4) Delete "," on page 5, line 8 of the specification.

(5) [Nominal ~ 100] J on page 5, line 13 of the specification
is corrected to [nominal amount of oxygen used 100cc] J.

(6) "Talc," on page 6, line 10 of the specification is corrected to "talc."

(7) Change “zeolite,” on page 6, line 15 of the specification to “
Zeolite” is corrected.

(8) Delete "," on page 7, line 9 of the specification.

(9) rOV/PE on page 8, line 2 of the specification,
(10) Correct rTcOJ on page 8, line 13 of the specification as “TC
Correct with DJ.

(11) Delete "," on page 8, line 14 of the specification.

(12) "Sampling ceiling" on page 8, lines 17 to 18 and the first line from the bottom of the specification is corrected to "sampling syringe."

(13) "Gas sealing" in the second line from the bottom of page 8 of the specification is corrected to "gas syringe."

(14) r (CO2%, 0
2%)” is corrected to “rcOz,O□”.

(15) "To," on page 9, line 13 of the specification is corrected to "to."

(16) Delete "," in the third line from the bottom of page 9 of the specification.

(17) 1 Example 1 on page 10, line 9 of the specification,” is replaced with “
Example 1”.

(18) Delete "," in the third line from the bottom of No. 10 of the specification.

(19) Example 1 on page 11, line 4 of the specification. "of"
Example 1”.

(20) "Example 1." on page 11, line 11 of the specification is corrected to "Example 1."

(21) Correct "Fukuro (2)" on the 6th line from the bottom of No. 11 of the specification to "Fukuro (1)".

(22) [C02,02 in the second line from the bottom of page 11 of the specification]
Correct J to "CO2,0□".

(23) The portion on page 16 of Table 2 on pages 16 to 17 of the specification is corrected as shown in the attached sheet.

Claims (1)

[Claims] A food product characterized in that the food is sealed in a non-ventilated container together with an oxygen absorber, an oxygen absorber and a carbon dioxide absorbent, or an oxygen absorber and an alcohol generator, and the oxygen concentration within the container is maintained at 10 ppm or less. How to save