JP2562327B2 - Oxygen generator for dry type - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (3-1) Field of Industrial Application The present invention provides an oxygen generator incorporated in a water-absorbing material that has been sufficiently impregnated with water in advance, and oxygen generated by the reaction with water. The present invention relates to a dry-type oxygen generator capable of supplying a fixed amount to the outside through a special packaging material that wraps the outside of a water-absorbing material.

(3-2) Conventional Technology Demand for oxygen generators that can easily generate oxygen is increasing in the fields of medical use, emergency work at disaster sites, transportation of live fish, etc. As the oxygen generator used in the above, it is well known that peroxides such as hydrogen peroxide, sodium percarbonate and calcium peroxide are reacted with a special acid to generate oxygen. ing. Usually, these chemicals are wrapped in a water-permeable and air-permeable packaging material, which is put into water and left standing. However, it is difficult for these conventional oxygen generators to generate a fixed amount of oxygen regularly and continuously.

Conventionally, attempts have been made to adjust the amount of oxygen generated by adding a special material to the above-mentioned oxygen generator. For example, in Patent Application Publication No. 145270 in 1986, a resin that absorbs water and swells is added to the oxygen generator described above in a bag using a packaging material, and this is put into water, and the swelling force of the resin causes A method of compressing an oxygen generating agent and promoting generation of oxygen has been proposed.

However, conventionally, no oxygen generator has been known that generates oxygen in a fixed amount over a long period of time in a regular and continuous manner. Further, in the conventional oxygen generator, water is indispensable for use, and there is no so-called dry type that does not require water.

(3-3) Problems to be Solved by the Invention Recently, live fish dishes are booming, but the distance and time for transporting live fish are gradually increasing due to imports from overseas, etc. in order to maintain their freshness. The supply of oxygen is becoming indispensable for this. Since normal live fish such as eel are transported with water, a conventional oxygen generator can be used, but live fish such as shrimp, crab, and shellfish is buried in chaff, sawdust, etc., and transported. The conventional oxygen generator cannot be used because there is no water, and if it is desired to use it, it must be transported together with water, but the transportation method becomes complicated and the transportation cost increases.

Also, as mentioned above, the transportation time of live fish is increasing,
Needless to say, it is desirable to supply oxygen in a regular and continuous manner over a long period of time in order to maintain its freshness. Was that.

The present invention solves the above-mentioned problems of conventional live fish transportation, and enables even supply of oxygen to live fish transported in the absence of water over a long period of time by a fixed amount, in a regular manner, At the same time, in other environments where water cannot be used, it is an object to provide a dry type oxygen generator that enables regular and continuous oxygen supply over a long period of time by a fixed amount. I am trying.

(3-4) Means for Solving Problems The present invention solves the above problems by making the oxygen generator as follows. That is, it is packed in an inner bag using a water-permeable and breathable wrapping paper that reacts with water to generate oxygen, and the outer side is covered with a water-absorbing material. The dry type oxygen generator is characterized by being wrapped in an outer bag using a breathable wrapping paper, immersed in water for a predetermined time, and then pulled up and used.

The wrapping paper used in the present invention is preferably, for example, paper, cloth, rayon paper or the like coated with a thin film of a resin such as polyethylene and provided with pores for improving air permeability. By appropriately selecting the size, it is possible to ensure that the water-absorbing material inside is sufficiently impregnated with water when first immersed in water, and that there is no water leakage during use.

(3-5) Action of the Invention The action of the dry type oxygen generator according to the present invention will be described below with reference to the drawings, and the oxygen generator, the wrapping paper and the water absorbing material will be described in detail. .

Stable peroxides such as sodium percarbonate and calcium peroxide are used as substances that react with water to generate oxygen, and as the additives, ascorbic acid, malic acid, and citric acid, which are the most common organic acids, are used. Powders of acid, succinic acid, tartaric acid, etc. are used as a mixture, but in addition to these, a catalyst is often added in order to make the reaction orderly, and activated carbon, MgO ₂ , enzymes, etc. are often used. The combination of these substances is determined in consideration of the speed and amount of oxygen generation, the stability and safety of the mixture, and the method of combining these substances and the like are well known and well known. .

FIG. 1 illustrates a schematic structure of a dry type oxygen generator according to the present invention. In the figure, the oxygen generating agent 1 having the above-mentioned configuration is packed in an inner bag 2, the outer side of the inner bag is covered with a water-absorbent material 3, and the whole is further wrapped in an outer bag 4. It is rare.

For the inner bag 2 and the outer bag 4, special wrapping paper as described below is used. That is, the material of this wrapping paper is a laminated material obtained by coating a base material such as paper, cloth, non-woven fabric, rayon cloth, or mixed paper containing synthetic fibers with a thin film of plastic such as polyethylene or polyvinylidene, and has heat sealability. desired. For example, when polyethylene and rayon mixed paper is used, it has water permeability and air permeability due to pre-drilled holes and holes drilled afterwards, and water enters the inside through the wrapping paper and reacts with the oxygen generator. However, the amount of oxygen released can be regulated to some extent.

This property can be applied to both the inner bag 2 and the outer bag 4, and by appropriately selecting the materials of both, the size and the number of holes, and combining them appropriately, it is possible to use them for a long time. It is possible to obtain a dry type oxygen generator that releases oxygen constantly and regularly.

The water-absorbent material 3 interposed between the inner bag 2 and the outer bag 4 shown in the figure has a characteristic of sufficiently absorbing water that has entered through the fine holes of the outer bag 4. Substances such as absorbent cotton, gauze, dust paper, wipes, and other miscellaneous paper that are used to reliably absorb a specified amount of water, and do not allow excess water to overflow and then overflow. Is desired.

However, this can be solved by limiting the time of immersion in water before starting use and sucking a certain amount of water.

(3-6) Example Hereinafter, an example of the present invention will be described. For comparison, an experimental example of a process starting from a conventional technique and reaching an example of the present invention is also shown. It was to be.

[Experimental method for each example] The following general materials were used as oxygen generators: calcium peroxide 50g organic acid 40g catalyst (activated carbon) 8g pH adjuster 2g total 100g This was packed in an inner bag and heat-sealed, Then, this is used by being wrapped twice with a water-absorbent material (in this case, wiping paper) (Example 1, Example 2), or by further wrapping these in an outer bag and heat-sealing (Example) 3 or later). Experiments were conducted by changing the material of the wrapping paper used for the inner bag and the outer bag. The apparatus shown in FIG. 2 was used for the experiment. That is, the sample 12 was put in the desiccator 11, the upper portion of the desiccator and the gas meter 13 were connected by the rubber tube 14, and the generated oxygen was measured.

[Example 1] 2 l of water was placed in a desiccator, 100 g of the oxygen generating agent was packed in an inner bag using a wrapping paper coated with polyethylene on Japanese paper, and wiped on top of this (the weight of one sheet was about 10
Put the sample wrapped in g) and stapled. A weight was attached so that it would not float up, and it was sunk, and the generated oxygen was measured. This example is similar to the conventional method in which it is placed in water and left standing. The measurement results are as shown in Table 1.

In this case, 70% of the oxygen is released in about 30 minutes, and most of the oxygen is released after 50 minutes, which is a regular and continuous oxygen supply over a long period of time. It defeats the purpose of the invention.

[Example 2] In the same manner as in Example 1 without pouring water in the desiccator, the oxygen generator 10 was placed in an inner bag using a Washi-polyethylene type wrapping paper.
It was filled with 0 g, wrapped with a wipe, and stapled. The sample was previously dipped in water to wet the wipe, and then pulled up to place it on the bottom of the desiccator. This experiment is to investigate how much the oxygen generating agent inside the wet wipe wipes decomposes to release oxygen, and is a basic experiment of the dry type. The results are as shown in Table 2.

In this case, too, the release of oxygen is too early and the water may drip, which is not suitable for the dry type.

Example 3 Water was not put in the desiccator, the inner bag was filled with the oxygen generating agent as in the case of Example 2, a wipe was wrapped, and the outer bag was wrapped with an outer bag. For this outer bag, a nylon non-woven fabric coated with polyethylene was used, and a wrapping paper with a needle hole having a diameter of 0.5 mm to 1 mm formed later was used. In this case, since it is difficult to absorb water during the process due to the nature of the wrapping paper used for the outer bag, it was immersed in water for about 15 minutes and placed in a desiccator for measurement. The results are shown in Table 4, but the holes made in the arrow-wrapped wrapping paper are too small to work properly. However, if this hole is too large, water will leak to the outside and it will not be a completely dry type. In any case, it seems that it is difficult to adopt the type that makes holes later.

[Example 4] (First example of the present invention) This example is almost the same as Example 3, except that the wrapping paper used for the outer bag is a Japanese paper-polyethylene type (with 2 mm holes) similar to the inner bag. And The results are shown in Table 4. Since this mold easily absorbs water, it has the feature that it can be used freely in the air by immersing it in water for about 5 minutes and pulling it up, and in particular, it can exert its effect when the place of use is sealed. Also
The amount of oxygen generated after 22 hours was 2.7 liters, which can be sufficiently used as a dry type oxygen generator.

Example 5 (Second Example of the Present Invention) The same as in Example 4, except that the outer bag was made of rayon-blended paper-polyethylene type (1 mm perforated) wrapping paper. Since this mold has low water absorption, it was first immersed in water for 15 minutes, then pulled up and placed in a desiccator for measurement. The results are as shown in Table 5.

In this method, it is understood that the amount of oxygen generated per hour is always constant and regular as desired. And first in the water 15
It has a feature that it can freely operate in the air if it is used by pulling it after soaking it for ~ 20 minutes, and it has an excellent effect as an oxygen generator for dry type, for example, for transporting live fish such as shrimp, crab and shellfish. It turns out to be a thing.

As shown in Table 5, the cumulative amount of oxygen generated after 20 hours is 2.
Although it is 7 liters, this value becomes 3.2 liters after 48 hours, which is equal to the total amount of this oxygen generating agent.

FIG. 3 is a graph showing the relationship between the oxygen generation amount and time in Examples 1 to 5 described above. From this figure, it is well understood that Example 4 and Example 5, which are examples of the present invention, supply oxygen in a constant amount regularly and regularly over a long period of time.

(3-7) Effects of the Invention In the present invention, an oxygen generator is composed of an inner bag filled with an oxygen generating agent, a water-absorbent material, and an outer bag that wraps the oxygen generator, and the oxygen generator is preliminarily immersed in water and then pulled up for use. By adopting the method, the following excellent effects are exhibited.

Even in the absence of water, it was possible to supply oxygen in a regular and regular manner over a long period of time.

It enables live fish such as shrimp, crab and shellfish to be transported over long distances without water.

[Brief description of drawings]

FIG. 1 exemplifies the schematic structure of a dry type oxygen generator according to the present invention, FIG. 2 is an experimental apparatus for comparing the embodiment of the present invention with a conventional method, and FIG. 7 is a graph showing the relationship between the amount of oxygen generated and time in Examples 1 to 5. 1 ... Oxygen generating agent, 2 ... Inner bag 3 ... Water absorbent material, 4 ... Outer bag 11 ... Desiccator, 12 ... Sample 13 ... Gas meter, 14 ... Rubber tube

Claims (3)

(57) [Claims] 1. A material that reacts with water to generate oxygen is packed in an inner bag made of a water-permeable and breathable wrapping paper, the outer side of which is covered with a water-absorbent material, and the outer side of which is passed through. Wrapped in an outer bag using water- and breathable wrapping paper,
An oxygen generator for a dry type, which is characterized by being immersed in water for a predetermined time and then pulled up and used. 2. The wrapping paper is a paper, cloth, rayon paper or the like coated with a thin film of a resin such as polyethylene, and is provided with pores for improving air permeability. 2. An oxygen generator for dry type according to item 1. 3. The method as set forth in claim 1, characterized in that what is pulled up after being soaked in water for the predetermined time is rapidly frozen and stored, and thawed as needed before use. Oxygen generator for dry type.