JPH05306104A - Oxygen generation material - Google Patents

Abstract

PURPOSE:To enable to use an oxygen generating material for long hours in a state without any decrease in pH due to a dissolved acid into water by shielding and adsorbing a chemical which is dissolved in a unreaction state as it is with an activated carbon layer, when a oxygen generating reacts with water. CONSTITUTION:The oxygen generating material 1 which generates oxygen in contact with water, is covered with a permeable sheet 2 and the activated carbon particle layer 3 is formed on the sheet 2, thus the oxygen generating material which is suited to transportation of live fish, etc., is produced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of an oxygen generating material used for transportation of live fish.

[0002]

2. Description of the Related Art With the recent taste of gourmets, it has become common to transport high-grade fish such as sea bream and flounder to the consuming region for a long distance in a live fish state. An oxygen generating material is used in which an oxygen generating agent that reacts with and generates oxygen is covered with a water-permeable sheet.

These oxygen generating materials generally have a duration of oxygen generation of about 12 to 24 hours, but from the viewpoint of time required before and after transportation and rational transportation, they are longer than 36 hours. There is a demand for an oxygen generating material capable of generating oxygen for a certain period of time. In this case, the purpose itself of long-term sustainability can be achieved by adding a short-time oxygen-generating material and continuing to use it, but live fish etc. are packed during transportation, and time and labor are required for additional use. It is annoying and irrational, and not suitable for practical use.

[0004]

As an effective measure against this problem, the content of the reaction catalyst such as activated carbon in the composition of the oxygen generating agent is reduced to reduce the reaction when the oxygen generating agent comes into contact with water. Attempts have been made to slow the generation of oxygen and allow it to last for a long time.However, when the reaction is slowed down by reducing the amount of catalyst, citric acid and apple contained in the composition of the oxygen generator. The reaction between acidic substances such as acids and peroxides such as calcium peroxide becomes insufficient, and there is a possibility that acidic substances may be eluted into water as acidic substances in an unreacted state, which may lower the pH in water. There is a nature.

The present invention has been made based on the above background, and an object of the present invention is to provide an oxygen generating material which can be used continuously for a long time without a decrease in PH due to an acid dissolved in water. It is to be.

[0006]

DISCLOSURE OF THE INVENTION The present invention is designed to prevent the unreacted acidic substance from being eluted into water, and its gist is to generate oxygen by contacting with water to generate oxygen. An oxygen generating material obtained by coating the agent with a water-permeable sheet, wherein an activated carbon particle layer is formed on the sheet.

[0007]

In the oxygen generating material of the present invention having the above-mentioned constitution, since the activated carbon layer is formed on the covering sheet, when the oxygen generating agent reacts with water, the citric acid or the like is in a state of not reacting with the peroxide. When it is eluted as it is, it is shielded and adsorbed by the activated carbon layer, it is maintained without elution outside the coating sheet, and it becomes possible to react with the peroxide that has been eluted with a delay, and it remains unreacted in water. Is no longer dissolved.

[0008]

EXAMPLES The present invention will be described more specifically below with reference to examples. FIG. 1 is a sectional view showing the structure of an oxygen generating material according to an embodiment of the present invention. In this embodiment, it comprises an oxygen generating agent 1, a cover sheet 2 covering the oxygen generating agent 1 and an activated carbon layer 3 formed on the cover sheet 3.

The oxygen generator 1 used in the present invention is, for example, a mixture of a peroxide of an alkaline earth metal such as calcium peroxide, an organic acid selected from citric acid, malic acid and the like and a catalyst. Any commonly used oxygen generator may be used without particular limitation.

The covering sheet 2 in this embodiment is formed in a bag shape and contains the oxygen generating agent 1. As the material of the covering sheet 2, it is possible to prevent the covered oxygen generating agent 1 from leaking out, and the water for permeating the oxygen generating agent 1 for contact and reaction with the oxygen generating agent 1 and the water and the oxygen generating agent 1 Any material such as woven fabric, knitted fabric, non-woven fabric, and paper may be used as long as oxygen generated by contact can be transmitted. As a method of covering the oxygen generating agent 1 with the covering sheet 2, any commonly used means such as wrapping, wrapping, encapsulation, etc. may be used, and it may be appropriately used as necessary. The activated carbon layer 3 is preferably formed on the covering sheet 2 on the inner surface of the covering sheet 2 (on the side where the oxygen generating agent 1 is present). When a plurality of covering sheets 2 are used in a laminated state, an activated carbon layer 3 may be formed between the covering sheets 2 and 2'which are laminated as in the modification shown in FIG.

FIG. 3 shows another embodiment. In this embodiment, the oxygen generating agent 1 is a cover sheet having an activated carbon layer on the inner surface.
Is rolled up. FIG. 4 shows still another embodiment. In this mode, the oxygen generating agent 1 covered with the inner bag 4 is covered with a coating sheet having an activated carbon layer on the inner surface. As the activated carbon that constitutes the activated carbon layer 3, commercially available activated carbon used as an adsorbent in pharmaceutical manufacturing, brewing, food related, water purifiers and the like is used. As the particle size of the activated carbon, particles of any size can be used as long as they do not fall out from between the constituent fibers of the covering sheet 2. However, from the viewpoint of commerciality as an oxygen generating material, the particle size is reduced so that the activated carbon layer 3 is preferably a thin layer.

As a means for forming the activated carbon layer 3 on the inner surface of the covering sheet 2, for example, when the covering sheet 2 is a single layer, a water-soluble or hydrophilic one which does not adversely affect fish and shellfish when dissolved in water is used. It suffices to mix it with a sizing agent and apply it to the surface of the covering sheet 2. When the covering sheet 2 has a plurality of layers, a commonly used method such as forming activated carbon between the covering sheets can be used. it can.

Examples 1 to 6 and Comparative Examples 1 to 4 In order to confirm the effect of the oxygen generating material of the present invention, the compositions shown in Table 1 of Table 1 below and Table 2 of Table 2 below were used. It was prepared and evaluated in the form. The results are shown in Table 3 below. In the table below, the oxygen generator is calcium peroxide (Ca
O ₂ ) and sodium percarbonate were used, and carboxymethyl cellulose (CMC) was used as a binder for the activated carbon layer. 28-48 mesh activated carbon was used for the activated carbon layer. The evaluation was performed based on the amount of oxygen generated, and was continuously measured by measuring in a graduated cylinder by the water displacement method, and the average value was adopted.
The pH was measured by an automatic pH recorder.

[0014]

[Table 1]

[0015]

[Table 2]

[0016]

[Table 3] As is apparent from Table 3 above, in the examples according to the present invention, the pH fluctuation to acidic was small, and the stability of the composition in water was excellent.

[0017]

The oxygen-generating material of the present invention, when the oxygen-generating agent reacts with water, shields and adsorbs the drug eluted in the unreacted state with the activated carbon layer and keeps it in the unreacted state. Eliminates the elution of water into water. Therefore, it becomes possible to use an oxygen generator having a composition in which the reaction catalyst is reduced, and it is possible to use the oxygen generator continuously for a long time in a state where there is no decrease in PH due to an acid eluted into water, which has been a problem in the past.

[Brief description of drawings]

FIG. 1 is a sectional view showing an oxygen generating material according to an embodiment of the present invention.

FIG. 2 is a sectional view showing an embodiment of the oxygen generating material of the present invention.

FIG. 3 is a sectional view showing an embodiment of the oxygen generating material of the present invention.

FIG. 4 is a sectional view showing an embodiment of the oxygen generating material of the present invention.

[Explanation of symbols]

 1 Oxygen generating agent 2 Covering sheet 3 Activated carbon layer 4 Inner bag

Claims (1)

[Claims] 1. An oxygen generating material comprising a water permeable sheet coated with an oxygen generating agent which generates oxygen when contacted with water, wherein an activated carbon particle layer is formed on the sheet. Material.