JPH01239002A - Packaging form for oxygen delivery - Google Patents

Abstract

PURPOSE:To provide the title packaging from so designed that a bag separately holding an aqueous solution of peroxide and a decomposer so as not to contact with each other are made with a membrane permeable for O2 but impermeable for water, thereby enabling O2 to be generated in water for a long time at a constant rate and preventing the contents from leaking into the external water. CONSTITUTION:An aqueous solution L of a peroxide and a decomposer C are separately held in a bag 1 so as not to contact with each other in the normal state, and part or the whole of the bag 1 is formed with a finely porous membrane 1A permeable for O2 but impermeable for water. For example, in the bag 1, said aqueous solution L is held in such a state as to be packed in an inner bag 2a, while said decomposer C is directly held. When this packaging form is to be used, the inner bag 2a is bursted by pressing from the outer side of the bag 1 to bring the aqueous solution L and the decomposer C into contact with each other. As a result, O2 is generated immediately or in a short time, therefore it is suggested that said packaging form be plunged into water or fitted on held on an appropriate position of a tank.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a package for supplying oxygen, particularly to an oxygen-generating package for creating an oxygen-rich environment in water when housing or transporting seafood. It is something.

Conventional Technology One way to prevent fish and shellfish from dying or losing freshness due to lack of oxygen during transportation is to supply oxygen into the water from cylinders, but cylinders are extremely heavy due to their weight. It is heavy and occupies space, which limits its scope of application.

Therefore, some simple means for supplying oxygen have been proposed. For example, Japanese Patent Application Laid-open No. 176904/1983 describes water-insoluble peroxides (barium peroxide, etc.), catalysts (manganese dioxide, etc.), and water quality control methods. It has been shown that an oxygen-generating solid agent, which is a solidified mixture containing agents (sodium nitrite and calcium phosphate), is introduced into a tank used for transporting seafood to generate oxygen. ing.

JP-A-57-123804 discloses that a porous molded body containing a catalyst (decomposer) such as rhenium oxide or rhenium hydroxide is placed in a tank, and a hydrogen peroxide solution or the like is added to the porous molded body. A method for generating oxygen by conducting an oxygen-generating liquid is disclosed.

Problems to be Solved by the Invention The method described in JP-A-60-176904 generates oxygen by simply adding an oxygen-generating solid agent consisting of a mixture of a peroxide, a catalyst, and a water quality conditioner into water. Although this method is simple, since the oxygen-generating solid agent comes into direct contact with water, there is a risk that minute amounts of peroxide, catalyst, or water conditioner dissolved in the water may have an adverse effect on fish and shellfish. Furthermore, it is not easy to adjust the water quality conditioner so that it gradually dissolves into the water an amount corresponding to the change in water quality as the reaction progresses. Other problems with this method include that it is difficult to generate a constant amount of oxygen over time, that the rate of oxygen generation varies considerably depending on the water temperature, and that cheap peroxides such as hydrogen peroxide cannot be used. There are also disadvantages.

In the method described in JP-A-57-123804, an oxygen-generating liquid such as hydrogen peroxide is sent to a porous molded body in which a catalyst is stocked, so that the reaction does not occur completely within the porous molded body. If this is not done, there is a risk that unreacted hydrogen peroxide will leak into the water, which becomes especially dangerous when the activity of the catalyst decreases. In addition, since the porous molded body containing the catalyst is in direct contact with water, there is a possibility that a small amount of the catalyst may be eluted into the water. Also, this method
There is an economic disadvantage in that the equipment cost is considerably high.

The present invention makes it possible to generate oxygen at a constant rate over a long period of time by simply placing a package containing an aqueous peroxide solution and a decomposing agent into water or placing it in an aquarium. The object of the present invention is to provide a packaging body for supplying oxygen that can be used without any risk of the contents of the packaging body leaking into water outside.

Means for Solving the Problems The oxygen supply package of the present invention contains an aqueous peroxide liquid (L) and a decomposer (C) inside a bag (1) in a state where they are not in contact with each other under normal conditions. The bag (1) is characterized in that at least a portion of the bag (1) is formed of a microporous membrane (1A) that allows oxygen to pass through but not water.

The present invention will be explained in detail below.

In the present invention, an aqueous peroxide liquid (L) and a decomposing agent (C) are housed inside the bag (1).

The aqueous peroxide liquid (L) includes hydrogen peroxide, urea hydrogen peroxide, sodium percarbonate, potassium percarbonate, calcium peroxide, strontium peroxide, barium peroxide,
Examples include aqueous liquids such as sodium persulfate, potassium persulfate, sodium perborate, and potassium hydrogen peroxysulfate. Among these, those that dissolve in water are treated as solutions, and those that are insoluble in water are treated as dispersions. The aqueous liquid refers to a solution or dispersion containing water as the main solvent.

Among these, an aqueous solution of hydrogen peroxide (aqueous hydrogen peroxide), especially a hydrogen peroxide concentration of 1 to 6
% by weight hydrogen peroxide solution is optimal.

When using hydrogen peroxide solution as the peroxide aqueous liquid (L), stabilizers such as carboxylic acids, sulfonic acids, phosphoric acids, phosphonic acids, tin compounds, uric acid, EDTA, barbituric acid, etc. may be present in the coexistence. A thickener such as a water-soluble polymer may be added if necessary.

As the decomposing agent (C) for decomposing the peroxide to generate oxygen, depending on the type of peroxide used, the following catalysts and/or accelerators, i.e., alkaline substances can be used. (sodium hydroxide, potassium hydroxide, calcium hydroxide, barium hydroxide, etc.), metal oxides (silver oxide, cupric oxide, aluminum oxide, magnesium oxide, titanium oxide, manganese dioxide, trimanganese tetroxide, manganese oxide, etc.) dicobalt, ferric oxide, sesquiferric oxide, triferric tetroxide, etc.), metal salts (ferric chloride, ferric sulfate, cobalt acetate, etc.), metal double salts (iron alum, aluminum alum, etc.), oxygen Acid salts (such as bismuthate), enzymes (
catalase, etc.) are used. Aqueous solution of peroxide (
When using hydrogen peroxide solution as L), in addition to those exemplified above, peroxides such as calcium peroxide, barium peroxide, and strontium peroxide can also be used. Then, not only hydrogen peroxide is decomposed to generate oxygen, but also oxygen is generated from the peroxide itself.

When the catalyst and/or promoter as exemplified above is supported on a porous carrier and formed into a granular form such as particles or pellets, oxygen is released for a long time upon contact with the aqueous peroxide liquid (L). This is advantageous because it occurs at a constant rate over time.

The above-mentioned aqueous peroxide liquid (L) and decomposer (C) are housed inside the bag (1), but in the present invention, at least a part of the bag (1) is It is formed with a microporous membrane (1A) that allows water to pass through but not water.

Examples of the microporous membrane (1A) include polypropylene membranes,
Polyamide membrane, polyvinyl chloride membrane, nitrified cellulose membrane,
Examples include an acetylcellulose membrane, a nitrocellulose membrane, and a polytetrafluoroethylene membrane. Microporous membrane (
1A) may be laminated with a porous or perforated sheet (perforated sheet, non-woven fabric, mesh, split film glued and laminated vertically and horizontally, etc.) for reinforcement or to provide heat sealability. good. Among the above,
In terms of performance, strength, cost, etc., polypropylene membranes, especially polypropylene membranes reinforced by laminating nonwoven fabrics, are recommended.

The bag (1) is formed by overlapping two thin layers and sealing around the four circumferences. However, when it has a bent part,
Since that part has a sealing function, no special sealing means is required.

In the present invention, although it is possible to form both the front and back surfaces of the bag (1) with the microporous membrane (1A),
The microporous membrane (1A) is expensive, so it is economically disadvantageous, and it is not necessarily suitable from the viewpoint of strength. Therefore, the entire or partial surface of one of the two surfaces constituting the bag (1) is made of microporous 11!2 (1A),
It is desirable to form the remaining surfaces with conventional thin layers (IB). As the normal thin layer (IB), a single layer or multilayer material made of plastic film, metal foil, etc. is used. In this case, it is desirable to make at least the inner surface a heat-sealable layer.

Figure 3 shows an example in which the microporous membrane (1A) is used on the entire or partial surface of one of the front and back surfaces of the bag (1); When the microporous membrane (1A) is used on the entire surface of the surface, (b) to (f) are the cases where the microporous membrane (1A) is used on a partial surface of one surface.

Inside the bag (1) are an aqueous peroxide liquid (L) and a decomposing agent (C).
), it is normally required that both be kept in a non-contact state with each other, and therefore the following method is adopted.

(2) Divide the bag (1) into two or more chambers with a weak seal line (4), and store the aqueous peroxide liquid (L) and decomposer (C) in separate chambers.

(2) Inside the bag (1), the aqueous peroxide liquid (L) is stored in the state filled in the inner bag (2a), and the decomposing agent (C) is directly stored.

(2) The aqueous peroxide liquid (L) is directly stored inside the bag (1), and the decomposing agent (C) is stored in a small bag or a small container (2b).

■ In the above ■, the aqueous peroxide liquid (L) is in the inner bag (
2a) is stored in a separate chamber from the decomposer (C).

■ Inside the bag (1), the aqueous peroxide liquid (L) is stored in the inner bag (2a), and the decomposer (C) is also stored in the small bag or container (2b). accommodate.

Among the five aspects illustrated above, ease of handling;
Considering the advantages in the manufacturing process, the embodiment (2) is particularly excellent, and the embodiments (2) and (2) are also preferred. Of course, embodiments ① and ② can also be implemented. Note that ■ and ■ indicate improved safety.

If the packaging was mistakenly used under high temperature conditions, the rate of oxygen generation would become excessive and the balance with the extraction rate would be disrupted, resulting in an increase in internal pressure, excessive expansion, and even rupture, or due to external conditions. It is possible that some injuries may occur due to this. In such cases, the contents of the package may leak into the water.

May have an adverse effect on seafood.

Therefore, when the package is used in applications where such accidents are expected, the entire package can be covered with a protector for preventing bursting due to overpressure or for buffering. Examples of the protector include a lattice-shaped cylinder, a lattice-shaped container, a net-like material, a high-porosity foam having continuous pores, and a coarse cloth.

The package may be provided with means for submerging it in water. For example, means such as enclosing a weight inside the bag (1), attaching a weight to the outside of the bag (1), or attaching a weight to the above-mentioned protector are adopted.

However, for example, when a foamed polystyrene box is used as an aquarium and seafood, etc. is placed in it and transported, a dent is made in a part of the inner wall of the foamed polystyrene box, and the oxygen supply packaging of the present invention is inserted into the dent. Since it can be fixed by sandwiching or storing it, a weight is not necessary in such a case.

The packaging body for oxygen supply of the present invention can be used underwater,
It is particularly useful for creating an oxygen-rich environment in water when housing or transporting seafood, and can also be used for purposes other than underwater use.

Function: When using the oxygen supply packaging according to the present invention,
The aqueous peroxide liquid (L) and decomposer (C) are brought into contact by pressing with fingers or hands from outside the bag (1).

For example, in the case of (2) above, the chambers are communicated by compressing the bag (1) and breaking the weak seal line (4).

In case (2) above, the inner bag (2a) filled with the aqueous peroxide liquid (L) is pressed from the outside of the bag (1) to break the bag. In the case of (■) above, the small bag or small container (2b) filled with the decomposer (C) is pressed from the outside of the bag (1>) to destroy it. First, tear the inner bag (2a) filled with the aqueous peroxide liquid (L),
Then, destroy the weak seal wire (4). In the case of (2) above, both the inner bag (2a) and the small bag or container (2b) are compressed from the outside of the bag (1) to break and destroy the bag.

As a result, the peroxide aqueous liquid (L) and the decomposer (C) come into contact with each other, and the peroxide starts to decompose, producing oxygen immediately or within a very short time. Therefore, put it in the water, or attach or store it in an appropriate position in the aquarium.

By selecting the type, combination, and quantitative ratio of the peroxide aqueous liquid (L) and the decomposer (C), the rate and time of oxygen generation can be freely controlled.

The generated oxygen is led out in the form of bubbles into the water outside through the microporous membrane (1A). Microporous membrane (1A) allows oxygen to pass through but does not allow water to pass through.
The peroxide aqueous liquid (L) will not leak out through the microporous membrane (1A), and no external water will enter into the bag (1) through the microporous membrane (1A), especially when oxygen is generated. Once this starts, the inside of the bag (1) is slightly pressurized, so there is no risk of water from outside entering.

Example Next, the invention will be further explained with reference to Examples.

Example 1 FIG. 1 is a sectional view showing an example of the oxygen supply package of the present invention, and FIG. 2 is a plan view thereof.

(1) is a bag with a size of 215 mm x 9 L Omm, and of the two sides, the entire back side and most of the front side are
A thin layer consisting of a laminate film with a polyester film as the outer layer and a polypropylene film as the inner layer (
IB), and the four peripheral edges are heat-sealed.

Of the front and back sides of bag (1), the front side is 60mm x 20mm.
A window (3) with a size of 1 is provided, and a microporous membrane (1A) with a size of 80 mm x 35 mm is covered from the inside of the window (3) by heat sealing. As the microporous membrane (1A), in this example, a laminate membrane consisting of a polypropylene membrane/thermofusible nonwoven fabric was used.

(2a) is an inner bag made of polypropylene film with a size of 170 mm x 60 mm cy), and an aqueous peroxide solution (
L) - As an example, 180 ml of 6% hydrogen peroxide solution was charged.

Inside the bag (1), in addition to an inner bag (2a) filled with an aqueous peroxide liquid (L), there is also an inner bag (2a) filled with an aqueous peroxide liquid (L), as well as a chipped granule with a diameter of 4 to 6 mm made of alumina particles supporting manganese dioxide and iron sesquioxide. Four decomposers (C) are stored.

The package having the above structure is compressed from the outside of the bag (1) to break the inner bag (2a) filled with hydrogen peroxide solution, and then a recess is made in the bottom of a foamed polystyrene acid water tank filled with water. The amount of oxygen released from the package into the water was measured over time.

To quantify oxygen, cover the vicinity of the two sides of the microporous membrane (1A) installation part of the package with a measuring cylinder held upside down with ice, and introduce the oxygen into the water through the microporous membrane (1A). This was carried out by introducing oxygen into the graduated cylinder and measuring the amount of oxygen accumulated in the graduated cylinder.

As a result, it was confirmed that oxygen was generated at a nearly constant rate, except for a few minutes immediately after the inner bag (2a) was broken. The amount of oxygen generated after 24 hours was 3000 ml, which was close to the theoretical amount of hydrogen peroxide used (3690 ml).

Example 2 FIG. 4 is a sectional view showing another example of the oxygen supply package of the present invention.

The bag (1) of Example 1 is divided by a weak heat seal line, which is an example of the weak seal line (4), to form two large and small chambers, and the large chamber contains an aqueous peroxide liquid (L), Each small chamber contained a decomposing agent (C). The microporous membrane (1A) was positioned towards the large chamber.

Next, the package having the above structure was pressed from the outside of the bag (1) to break the weak seal line (4) and to establish communication between the large and small chambers. Thereafter, the amount of oxygen generated was measured in the same manner as in Example 1, and the same results as in Example 1 were obtained.

Example 3 FIG. 5 is a sectional view showing another example of the oxygen supply package of the present invention.

(1) is a bag with a size of 215 mm x 910111111 (7), and of the two sides, the entire back side and the front side
/4 sides are formed of a thin layer (IB) consisting of a laminate film with a biaxially oriented polypropylene film as an outer layer, an aluminum vapor deposited layer as an intermediate layer, and a polyethylene extrusion coating layer as an inner layer, and the 4 peripheries are heat-sealed. has been done.

Of the front and back sides of the bag (1), 1/4 of the surface is formed of the same microporous membrane (1A) as in Example 1.

(2b) is a small container containing 1.5g of calcium peroxide.
is filled.

In addition to the small container (2b) filled with calcium peroxide, the inside of the bag (1) is directly filled with 200 ml of 5.5% hydrogen peroxide solution as an example of an aqueous peroxide solution (L). It is.

The package having the above structure was pressed from the outside of the bag (1) to break the lid of the small container (2b), and the amount of oxygen generated was measured over time in the same manner as in Example 1.

As a result, it was confirmed that oxygen was generated at a substantially constant rate from the time the inner bag (2a) was broken. The amount of oxygen generated after 24 hours was 3220 ml.

Note that as time passes further, the amount of oxygen generated exceeds its theoretical amount of 3400 ml. This is thought to be because oxygen is also generated from calcium peroxide, which is a decomposing agent.

Effects of the Invention The oxygen supply package of the present invention can generate oxygen at a constant rate over a long period of time simply by putting it into water or attaching it to a recess made in a part of the inner wall of an aquarium. can be done. Furthermore, there is no risk that the contents of the package will leak into the water outside, so they will not harm the seafood.

Therefore, it is easy to handle, light in weight, and can completely achieve the intended purpose of oxygen supply.

The rate of oxygen generation can be freely controlled by selecting the type, combination, and quantitative ratio of the aqueous peroxide liquid (L) and decomposer (C).
Long-term transportation (e.g. 16 hours, 24 hours, 36 hours)
can be dealt with.

The oxygen supply package of the present invention is also advantageous in that its manufacturing cost can be minimized.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an example of the oxygen supply package of the present invention, and FIG. 2 is a plan view thereof. FIG. 3 shows an example in which a microporous membrane (1A) is used on the entire or partial surface of one of the two surfaces constituting the bag (1). FIG. 4 is a sectional view showing another example of the oxygen supply package of the present invention. FIG. 5 is a sectional view showing another example of the oxygen supply package of the present invention. (1)...Bag, (1A)...Microporous membrane, (IB)
...Thin layer, (2a)...Inner bag, (2b)...
Small bag or container, (3)...Window, (4)...Weak seal line, (L)...Aqueous peroxide liquid, (C)...
Decomposition agent

Claims (1)

[Claims] 1. A peroxide aqueous liquid (L) and a decomposer (C) are housed inside a bag (1) so as to maintain a non-contact state with each other under normal conditions; A package for supplying oxygen, characterized in that at least a portion of item 1) is formed of a microporous membrane (1A) that allows oxygen to pass through but does not allow water to pass through. 2. Bag (1
) The entire or partial surface of one of the two surfaces constituting the front and back surfaces is formed of a microporous membrane (1A), and the remaining surface is formed of a normal thin layer (1B). The package according to item 1. 3. The bag (1) is divided into two or more chambers by a weak seal line (4), and the aqueous peroxide liquid (L) and the decomposer (C) are housed in separate chambers. The package according to claim 1. 4. A claim characterized in that the aqueous peroxide liquid (L) is contained in the inner bag (2a) and the decomposing agent (C) is directly contained in the bag (1). 1. The package according to 1. 5. The aqueous peroxide liquid (L) is directly stored inside the bag (1), and the decomposing agent (C) is stored in a small bag or a small container (2b). The package according to claim 1. 6. The package according to claim 1, wherein the decomposer (C) has a granular shape in which a catalyst and/or a promoter are supported on a carrier. 7. The package according to claim 1, wherein the aqueous peroxide liquid (L) is a hydrogen peroxide solution.