JPH02284646A - Disoxidant - Google Patents

Abstract

PURPOSE:To obtain a disoxidant not detectable with a metal detector by blending glycerol with an alkaline substance. CONSTITUTION:A disoxidant is composed of glycerol and an alkaline substance such as NaOH or KOH. Water and/or a compd. (e.g. halide or sulfate) of a transition metal such as iron, e.g. ferrous chloride or ferrous sulfate or a slightly water soluble solid such as activated carbon or zeolite is further added as required. Since the highly hygroscopic glycerol is used as a base and iron powder is not used, a metal detector for checking the mixing of packed food with foreign matter can be worked without hindrance.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an oxygen scavenger. In more detail, the present invention relates to a novel oxygen scavenger whose main ingredient is glycerin.

In this specification, the term ``1 oxygen scavenger'' is mainly used to mean ``composition having an oxygen scavenging effect'' (oxygen scavenger composition), but it also refers to a ``package of a composition having an oxygen scavenging effect'' (oxygen scavenger composition). It is also sometimes used to mean an oxygen agent package.

[Conventional technology]

Oxygen absorbers are used as a preservation technique for foods, etc.
This is a gas-barrier sealed bag or container (hereinafter referred to as
Sometimes simply called a sealed container or container. ) The presence of food oxygen scavenger^ in the sealed system makes the sealed system virtually oxygen-free, thereby suppressing the oxidation of foods, etc. and the growth and proliferation of bacteria and mold. Used for preservation.

Conventionally, oxygen scavengers based on iron powder have been used for reasons such as their oxygen absorption ability, ease of handling, safety, and cost.

By the way, in the case of packaged foods, for example, after the food is sealed in a packaging bag, it is passed through a metal detector to check for foreign matter contamination.

However, since oxygen absorbers based on iron powder are naturally detected by metal detectors, metal detectors cannot be applied to packaged foods that contain oxygen absorbers.

[Problems to be Solved by the Invention] In view of the problems of the prior art described above, an object of the present invention is to provide an oxygen scavenger that will not be detected even when applied to a metal detector.

[Means to solve the problem]

A means for solving the above problems is to use a composition of glycerin and an alkaline substance as an oxygen scavenger.

Embodiments of the solution include (1) an oxygen scavenger made of glycerin and an alkaline substance, (2) an oxygen scavenger made of glycerin, an alkaline substance, and water, (3) glycerin,
Oxygen scavenger consisting of an alkaline substance and a transition metal compound, (4) Oxygen scavenger consisting of glycerin, an alkaline substance, transition metal compound and water, (5) Oxygen scavenger consisting of glycerin, an alkaline substance and a poorly water-soluble solid, (6) )
Glycerin, an alkaline substance, an oxygen scavenger consisting of a poorly water-soluble solid and water, (7) glycerin, an alkaline substance,
Oxygen scavenger consisting of a transition metal compound and a poorly water-soluble solid;
(8) Glycerin, alkaline substances, transition metal compounds,
Examples include oxygen scavengers consisting of poorly water-soluble solids and water.

In the above-mentioned solution, the glycerin may be a commercially available glycerin, and may contain impurities such as water.

In addition, alkaline substances include substances that exhibit alkalinity by acting with or dissolving in water, such as hydroxides, carbonates, hydrogen carbonates, and tertiary phosphates of alkali metals or alkaline earth metals. Diphosphates and the like are preferred, and alkali metal and alkaline earth metal hydroxides are particularly preferred. Specifically, for example, sodium hydroxide, sodium carbonate, sodium hydrogen carbonate, sulfur and lithium triphosphate, sodium diphosphate, potassium hydroxide, potassium carbonate,
Potassium hydrogen carbonate, potassium triphosphate, potassium diphosphate, calcium hydroxide, magnesium hydroxide, and the like are preferred. Among these, sodium hydroxide, potassium hydroxide, calcium hydroxide, etc. are particularly preferred. The alkaline substances can be used alone or in combination of two or more. The amount of alkaline substance mixed with glycerin is 1 (10) parts (by weight, the same hereinafter) of glycerin.
Part or more is preferable, and 30-1. (10) 0 parts is more preferable. If the amount of the alkaline substance mixed is less than the above range, the amount of oxygen absorbed by the composition will be unfavorable, and if the amount of the alkaline substance mixed is more than the above range, the amount of oxygen absorbed per unit weight will be small. Therefore, it is necessary to increase the size of the packaging material used to package the composition, which leads to problems in loading the food package and is also unfavorable in terms of appearance.

Examples of transition metal compounds include transition metal halides, sulfates, nitrates, phosphates, carbonates, organic acid salts, oxides,
Examples include hydroxides, other double salts, and chelate compounds. As the transition metal, iron, cobalt, nickel, copper, zinc, manganese, etc. are used, and copper, iron, manganese, etc. are preferable, and iron is most preferable from the viewpoint of safety. Specific examples of the most preferred transition metal compounds include ferrous chloride,
Ferric chloride, ferrous sulfate, ferric sulfate, ferrous hydroxide,
Examples include inorganic or organic iron compounds such as ferric hydroxide, iron citrate, ferrous tartrate, and ferric tartrate. These transition metal compounds are added singly or in combination of two or more as necessary, and act as a catalyst for the composition of the present invention, and the amount of the transition metal compound is 1 part or more per 1 (10) parts of glycerin. is preferred, and 5 parts or more is particularly preferred.

Slightly water-soluble solids are solid substances that are insoluble or sparingly soluble in water, and specifically include activated carbon, zeolite, perlite, diatomite, activated clay, silica, kaolin, talc, benthite, activated alumina, and gypsum. , silica al-
Examples include powders or granules of calcium silicate, magnesium oxide, graphite, carbon black, aluminum hydroxide, iron oxide, and the like. The poorly water-soluble solids may be used alone or in combination of two or more. By incorporating a poorly water-soluble solid, it is possible to increase the oxygen absorption rate or the amount of oxygen absorption, and to simplify the handling of the composition. Furthermore, by incorporating a poorly water-soluble solid, the contact area of the liquid component in the composition with oxygen can be increased. The amount of the poorly water-soluble solid to be blended is appropriately selected in relation to other components, and is not particularly limited, but is 0.1 to 10.0 parts per 1 (10) parts of glycerin. (10
) 0 parts are preferred, and 1 to i, ooo parts are particularly preferred.

In the present invention, there are no particular restrictions on the method of mixing the above-mentioned components, but if the components are liquid and powder, any method that can uniformly mix each component may be used, and if granules are used as the component, for example, A method may be adopted in which the liquid is impregnated into the granular material and then the powder is added so as to be sprinkled thereon. Each of the above components is usually housed in an air-permeable packaging material to form a package. As for the packaging method, for example, after mixing each component, it can be wrapped in a pouch sealed by heat-sealing the periphery of an air-permeable packaging material using a backing machine to form an oxygen absorber package.

This oxygen absorber package can be used to preserve foods, etc. by storing the oxygen absorber package together with foods, etc. in an air-impermeable packaging material and sealing it, or by storing it together with foods, etc. in an airtight container and sealing it.

[Effect]

When the oxygen absorber of the present invention does not contain water in its composition, it can be applied to foods with a relatively high moisture content, and the oxygen absorber of the present invention can be of a type that absorbs oxygen by incorporating moisture that evaporates from the food into the composition. I can do it. Glycerin is extremely hygroscopic, so
It has a good deoxidizing function in an atmosphere with high water evaporation. In this case, the advantage is that it is easy to handle until it is sealed together with food. Furthermore, if water is added to the composition, it can be used as an oxygen absorber that removes oxygen regardless of the water content of the food.

〔Example〕

Examples 1 to 8 After mixing the oxygen scavenger components shown in Table 1, a small bag (
50 mm long and 80 mm wide) to form an oxygen absorber package. This oxygen absorber package was heated to 1° (10) ml of air.
Then, put it in a bag made of polyvinylidene-coated stretched nylon and polyethylene, and after sealing it,
Several hundred people were placed in an atmosphere of 5℃.

After 6 days, the oxygen concentration in the bag was measured and the amount of oxygen absorbed was determined. The results are shown in Table 1.

Table 1 (Continued) For Examples 1.3.5 and 7, water-impregnated absorbent cotton was sealed together and the tests were carried out at a relative humidity of 1 (10)%.

Example 9 Glycerin 2g, calcium hydroxide 2g, ferrous chloride 0
, 1.2 g of silica powder, 0.4 g of activated carbon, and 1.2 g of water were mixed and used as an oxygen scavenger.

Two days later, when I measured the oxygen concentration inside the bag, it was 0.
．． It was less than 1%. The amount of oxygen absorbed at this time is 206mn
Met.

Example 10 The same procedure as in Example 1 was carried out except that 2 g of glycerin, 3.4 g of calcium hydroxide, 0.6 g of manganese chloride, 2.6 g of silica powder, and 2 g of water were mixed and used as an oxygen scavenger.

Two days later, when I measured the oxygen concentration inside the bag, it was 0.
．． It was less than 1%. The amount of oxygen absorbed at this time was 206rr
L1. Met.

Example 11 2 g of glycerin, 3.4 g of calcium hydroxide, 0 copper sulfate
, 2.6 g of activated carbon, and 3.4 g of water were mixed and used as an oxygen scavenger, but the same procedure as in Example 1 was carried out.

Two days later, when I measured the oxygen concentration inside the bag, it was 0.
．． It was less than 1%. The amount of oxygen absorbed at this time was 206 d.

Example 12 Four (10) adult brown elephants were raised in 1 kg of brown rice for one week, and then the adults were removed. The remaining brown rice was divided into 40 g portions and used for the following samples.

40 g of brown rice as a sample and the oxygen absorber package of Example 9 were placed in a bag made by laminating polyvinylidene chloride coated stretched nylon and polyethylene, and the air volume in the bag was 1.(10).
It was sealed so that it was 0 mj2. Ten identical specimens were prepared and stored in a thermostatic chamber at 20°C. After storing it for 20 days, open it and leave it indoors at 25 degrees Celsius to record the number of brown elephants that emerge from the brown rice sample.

As a control, the same test as above was conducted except that the oxygen absorber package was not enclosed in the bag. In this case, the number of brown elephants emerging was set at 1 (10)%.

The results are shown in Table 2.

Example 13 Ten 15g steamed buns and the oxygen absorber package of Example 11 were placed in a bag made of a laminate of polyvinylidene chloride coated stretched nylon and polyethylene, and the amount of air in the bag was...
(10)0m7! It was stored sealed at 20°C. After 11 weeks, the oxygen concentration and carbon dioxide concentration in the bag were measured, and the properties of the manju were observed.

As a control, the same test as above was conducted except that the oxygen absorber package was not enclosed in the bag.

The results are shown in Table 3.

〔Effect of the invention〕

Since the oxygen scavenger of the present invention does not use iron powder, it will not be detected even if it is placed in a metal detector after being sealed together with food, making it possible to test food for foreign matter contamination. Furthermore, since it uses glycerin as its main ingredient, it is highly safe in terms of ingredients and does not emit toxic gases during the reaction.

Procedural amendment June 6, 1999

Claims (10)

[Claims] (1) Oxygen scavenger consisting of glycerin and alkaline substances. (2) An oxygen scavenger consisting of glycerin, an alkaline substance and water. (3) An oxygen scavenger consisting of glycerin, an alkaline substance, and a transition metal compound. (4) An oxygen scavenger consisting of glycerin, an alkaline substance, a transition metal compound, and water. (5) An oxygen scavenger consisting of glycerin, an alkaline substance, and a poorly water-soluble solid. (6) An oxygen scavenger consisting of glycerin, an alkaline substance, a poorly water-soluble solid, and water. (7) An oxygen scavenger consisting of glycerin, an alkaline substance, a transition metal compound, and a poorly water-soluble solid. (8) Glycerin, alkaline substances, transition metal compounds,
An oxygen scavenger consisting of a poorly water-soluble solid and water. (9) An oxygen absorber package comprising the oxygen absorber according to any one of claims 1 to 8 housed in an air-permeable packaging material. (10) A food package obtained by storing the oxygen absorber package according to claim 9 and a food in an air-impermeable packaging material or an airtight container and sealing or sealing the package.