JPS62186942A - Deoxidizer - Google Patents

Abstract

PURPOSE:To reduce the generation of aldehydes when the titled deoxidizer is jointly used with an alcoholic food preserving agent by mixing an iron component having deoxidizing capability and a polyamino acid or a polymer contg. an amino acid to prepare the deoxidizer. CONSTITUTION:An iron component having deoxidizing capability and a polyamino acid or a polymer contg. an amino acid are mixed, and the mixture is enclosed in a gas-permeable bag to prepare the deoxidizer. The deoxidizer is composed of 100pts.wt. iron component having deoxidizing capability and >=0.2pt.wt., preferably 1-20pts.wt., on a dry weight basis of the polyamino acid or the polymer contg. an amino acid. Reduced iron powder, electrolytic iron powder, sprayed iron powder, etc., are appropriately used as the iron component having deoxidizing capability. Polysaccharides consisting of amino acids such as chitin and chitosan can be exemplified as the polymer contg. an amino acid.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to oxygen scavengers.

[Prior art]

When an oxygen absorber is used in packaged foods, the inside of the package is kept anaerobic, thereby significantly inhibiting the growth of aerobic microorganisms such as mold. However, it has become clear that many microorganisms grow vigorously even under anaerobic conditions, and that substantial preservation cannot often be ensured simply by using oxygen scavengers.

Therefore, attempts have been made to use ethyl alcohol, which has the property of enhancing antibacterial activity under anaerobic conditions.

[Problem that the invention seeks to solve]

As mentioned above, the combination of ethyl alcohol and oxygen scavenger is extremely effective in improving the shelf life of packaged foods, but on the other hand, when ethyl alcohol vapor comes into contact with an iron-based oxygen scavenger, ethyl alcohol is oxidized and converted to acetaldehyde. It turns out that there is a serious problem of change. This generation of acetaldehyde is undesirable because it causes discoloration of foods and the generation of off-flavors.

[Means for solving problems]

Therefore, as a result of various studies, the present inventors found that if an oxygen scavenger containing an iron-based oxygen scavenging component and a polymer containing polyamino acids or amino sugars was sealed in a container together with an alcohol-based food preservative, the amount of aldehyde in the container It was found that the amount was significantly reduced compared to when using an oxygen absorber that does not contain polyamino acids or the like.

The present invention was completed based on the above findings.

That is, the present invention relates to an oxygen scavenger in which an iron-based component having an oxygen scavenging ability and a polyamino acid or a polymer having an amino sugar coexist.

As the iron-based component having oxygen scavenging ability used in the present invention, for example, reduced iron powder, electrolytic iron powder, atomized iron powder, etc. are preferable.
The particle size is usually about 10 mesh or less, preferably about 50 mesh or less. Further, the iron powder does not need to be a pure product; for example, in order to improve the oxygen scavenging ability, any type of iron powder such as sodium chloride or potassium chloride can be used.

In addition, the polyamino acid is not particularly limited, and examples thereof include homopolymers such as polylysine, polyalanine, polyglutamic acid, polyglycine, and polyarginine, poly(alanine-dalisine), glutamine ff-7-methyl-urethane copolymer, etc. Among them, copolymers having basic amino acids such as lysine and arginine as constituents are preferred. The average molecular weight is not particularly limited, but for example, 6. A value of OOO to 1 o, o o o is practical.

The particle size is preferably 10 mesh or less, preferably 50 mesh or less, and more preferably about 100 to 250 mesh.

Examples of polymers having amino sugars include:

Polysaccharides made of amino acids such as chitin and chitosan can be opened.

The amine moiety of these polyamino acids and polymers may be free, or a part or all of them may be in the form of a salt with an organic or inorganic acid such as an acetate or a hydrochloride. In particular, when using an untreated surface such as reduced iron powder as a component with oxygen scavenging ability, in order to increase the oxygen scavenging ability, it is treated with acid to convert some or all of the amine into the form of an acid salt. It is desirable to use polyamino acids or polymers thereof. Note that the polyamino acid and the polymer can be used either in dry or wet form.

The ratio of the iron-based oxygen scavenging component to the polyamino acid or polymer having an amino group is 10% of the oxygen scavenging component.
The dry weight of the polyamino acid or the polymer is 0.2 parts by weight or more, preferably about 1 to 20 parts by weight, relative to 0 parts by weight. In addition, 1 the thipolyamino acid or the polymer of the present invention
・2 to 30 W/W%, preferably 1 to 2 o W/W-
Good condition.

The oxygen scavenger of the present invention may be produced, for example, as follows. That is, an iron-based component having oxygen scavenging ability and a polymer having polyamino acids or amino sugars may be mixed and sealed in a breathable bag. Note that a filler such as silica gel may be mixed with the oxygen scavenger of the present invention.

〔Effect of the invention〕

Next, the effects of the oxygen scavenger of the present invention will be explained using experimental examples.

Experimental Example (Sample) The oxygen scavenger obtained by the method of Examples 1 and 2 was designated as Sample 1.2 of the present invention, and in Example 1.2, poly-cylysine,
An oxygen scavenger manufactured without using chitosan was used as a control sample.

〔experimental method〕

Sample, commercially available ethyl alcohol sustained release agent (trade name Oitetsu, containing 0.659 ethyl alcohol, 13honkayaku)
Co., Ltd.) and absorbent cotton soaked with water for a specified number of days.
After being left at room temperature, the amount of acetaldehyde in each bag was measured by gas chromatography.

In addition, oxygen concentration was measured using an oxygen meter.

(Results) The results are shown in Tables 1.2 and 3. Since it is difficult to express the amount of aldehyde as a quantitative value, it is expressed as a relative value, assuming that the amount of aldehyde in the bag containing the control sample was 1100.

As is clear from this table, when the oxygen scavenger of the present invention is used, the amount of aldehyde in the container is significantly reduced compared to when it is not used. Therefore, the oxygen scavenger of the present invention is particularly suitable for use with alcohol-based food preservatives for food preservation.

Hereinafter, the method for producing the oxygen scavenger of the present invention will be explained with reference to Examples.

Example 1 Mix 2 d of Japanese saline solution with 1007 electrolytic iron powder.

Then, it is dried under reduced pressure. This material 52 was uniformly mixed with 0.084 f of dried poly-L-lysine with a particle size of 150 mesh and an average molecular weight of t o, a o o, and this material was placed in a paper bag laminated with a 41 m x 7 cll perforated polyethylene film. The oxygen scavenger of the present invention was obtained by encapsulating the oxygen absorber in

Example 2 An oxygen scavenger of the present invention was obtained in the same manner as in Example 1 except that 0.3 ft. of dried chitosan was used instead of polyJ+L-lysine.

Claims (1)

[Claims] An oxygen scavenger that contains an iron-based oxygen scavenging component and a polymer containing polyamino acids or amino sugars.