JPS594011Y2 - Sansohatsu Seisouchi - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a new and useful oxygen generating device suitable for use as part of equipment for transporting live fish and shellfish.

The invention consists of a container, a water-impermeable, oxygen-permeable membrane made of an open-cell microporous polymer film placed over the mouth of the container, and a porous medium placed on top to reinforce the membrane. Provided is an oxygen generator for transporting live fish and shellfish, which comprises a lid, an outer lid having an opening for fixing the membrane and the porous inner lid, and a hydrogen peroxide solution and a decomposition catalyst housed in a container. It is something.

To explain one embodiment shown in the drawings, in the drawing, 1 is a container made of a suitable material, and 2 is a container 1.
3 is a water-impermeable, oxygen-permeable membrane made of an open-cell microporous polymer film placed over the mouth of the membrane 2; sheet-like porous inner lid,
Reference numeral 4 designates an outer lid for fixing the membrane 2 and the porous inner lid 3, and 5 designates a hydrogen peroxide solution and a decomposition catalyst contained in the container 1.

The hydrogen peroxide solution placed in the container is gradually decomposed into oxygen and water by the decomposition catalyst, and the generated oxygen passes through the membrane 2 and exits.

If container 1 is made of heavy material such as glass,
This container can be submerged at the bottom of a transport container containing live fish and shellfish with water, or even if the container is made of light material, if it is fixed to the bottom of the transport container, the generated oxygen will be absorbed by the live fish and shellfish. supplied to shellfish.

There is no particular limit to the concentration of hydrogen peroxide, but it is generally 2.
0% or less is appropriate.

Further, as the decomposing agent, known decomposing agents such as heavy metal ions, alkalis, and activated carbon can be used, but ferric chloride and the like are most suitable.

For example, when the concentration of hydrogen peroxide is 8% and the concentration of Fe+++ ions is 400 to 600 ppm, oxygen can be generated for 3 to 6 hours.

Various types of breathable, water-impermeable open-cell microporous polymer films can be used, but they may be made porous by a solvent method, stretching method, electron beam, etc., and treated to be water repellent if necessary. Examples include microporous films of plastics such as polyolefins such as polypropylene and polyethylene, polycarbonates, polyamides, and polyethers such as polyacetals.

For the purpose of the present invention, a membrane with well-balanced air permeability and water permeability is optimal, and a water-repellent microporous film with a pore diameter of about 0.3 μm is suitable.

Such a film can be produced, for example, by the method described in Japanese Patent Publication No. 46-40119.

Polypropylene films are particularly preferred for the purpose of the present invention, e.g. air permeability of 3 to 5 cc/cm2, min, c
A film which is water-impermeable at pressures below 20 kg/cm@2 in mHg is commercially available as Duragard No. 2500 from Polyplastics II and is highly suitable for the purposes of the present invention.

Practically speaking, it is desirable to use such a membrane in the form of an insert sheet placed over the mouth of the container 1 as shown in the drawings.

Although the above film can be used as it is, it is better to appropriately reinforce it by laminating or overlapping it.

That is, since there is a risk that this membrane alone may be damaged by collision with fish or may be expanded by oxygen pressure, it is generally necessary to attach a reinforcing material such as the above-mentioned porous inner lid to the outside of the membrane.

The oxygen generating device of the present invention thus constructed can be used by being submerged in the water of a container for transporting live fish and shellfish and fixed to the bottom of the water by appropriate means.

The device of the present invention is extremely simple and economical to manufacture;
Furthermore, there is no need to worry about hydrogen peroxide leaking.

That is, unlike conventional devices, only oxygen is transferred and supplied to live fish and shellfish through a special membrane, so its effects are extremely stable and reliable.

[Brief explanation of the drawing]

The figure is a schematic cross-sectional view of a preferred type of device of the invention. 1... Container, 2... Membrane, 3...
- Porous inner lid, 4...Outer lid, 5...Hydrogen peroxide water molecule decomposer.

Claims (1)

[Scope of utility model registration request] a container, a water-impermeable, oxygen-permeable membrane made of an open-cell microporous polymer film placed over the mouth of the container, and a porous inner lid placed thereon to reinforce the membrane; An oxygen generating device for a transportation tool for live fish and shellfish, which comprises an outer lid having an opening for fixing the membrane and the porous inner lid, and a hydrogen peroxide solution and a decomposition catalyst contained in a container.