JPH03155732A - Packaging of crustacean - Google Patents

Abstract

PURPOSE:To remove noxious gas generated from crustaceans and to preserve crustaceans in fresh state over a long period by mixing a porous material to a cushioning material, filling the mixture in a container and putting and packing fresh crustaceans such as lobster and crab in the container. CONSTITUTION:Crustaceans are packaged in a container filled with a cushioning material mixed with a porous material (e.g. zeolite, cristobalite, clinoptilolite or OHYA stone having fine pores of 2-3,000Angstrom in diameter).

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a packaging method for crustaceans suitable for preserving, distributing, and transporting fresh crustaceans such as shrimp and crabs.

<Conventional technology> Conventionally, the method for preserving and distributing seafood and crustaceans alive is to store raw fish, etc. in a container filled with seawater, etc., enclosing oxygen or installing an oxygen supply device. was there. Although this method has a very high survival rate for raw fish and is effective, it is not suitable for general home delivery distribution because it requires too much equipment and transportation costs.

Another method, especially for crustaceans, is to store shrimp, crabs, etc. in containers filled with a buffering material such as sawdust. Cushioning materials such as sawdust not only absorb external shocks, but also suppress the movement of crustaceans and help maintain freshness.

Furthermore, many cushioning materials also have a heat-retaining (cold-retaining) effect, so if necessary, by enclosing a cold storage agent, etc., it is possible to maintain a low temperature for a relatively long period of time.
Freshness is better maintained.

<Problems to be Solved by the Invention> However, even the packaging method using the above-mentioned cushioning material cannot be said to have a sufficient freshness preservation effect. especially,
In summer, etc., the mortality rate reaches 20-30% within about 3 days after packaging. When the cause of this was investigated, it was found that a major factor was the presence of harmful gases such as ammonia generated from the waste products of ABM.

Therefore, the present invention is a method for packaging crustaceans, which aims to eliminate the above-mentioned harmful gases and maintain the freshness of the crustaceans for an extremely long period of time.

Means for Solving the Problems> In other words, the present invention requires that, when housing and packaging crustaceans in a container filled with a buffer material, for example, about 5 to 60% of a porous material is mixed with the buffer material. This is a unique packaging method for crustaceans.

Effect> According to the present invention, harmful gases generated from waste products of crustaceans are adsorbed by the mixed porous material and removed.

<Example> The container used in the present invention is not particularly limited, and may include a cardboard box,
A foamed plastic container, a plastic molded container, a wooden box, or the like may be used, and a partition member or the like may be provided as necessary.

The container is filled with a buffer material mixed with a porous material.

As the buffer material, powdery materials such as sawdust, rice husks, and foamed plastics are preferably used.

When the buffer material has water absorption properties, the buffer material may be impregnated with moisture such as water, seawater, mineral water, etc., with the main purpose of moisturizing the atmosphere.

The porous material used is a material having micropores of about 2 to 300 OA and capable of adsorbing harmful gases such as ammonia. Specifically, natural inorganic porous materials such as zeolite, cristobalite, clinoptilolite, and otani stone, synthetic zeolite, activated carbon, and the like can be used. It is known that these porous materials exhibit selective adsorption characteristics depending on their material and pore size, and it is preferable to determine the material to be used depending on the target component to be removed.

The porous material is mixed with the buffer material in a volume ratio of about 5 to 60%. If it is less than 5%, adsorption of the target harmful substance is insufficient, and if it exceeds 60%, the buffering effect and heat-retaining (cold-retaining) effect of the buffer material will be impaired.

As described above, crustaceans are housed and packaged in a container filled with a buffer material and a porous material, and it is preferable that the crustaceans are housed so as to be buried in the buffer material. This is to suppress the movement of crustaceans as described above.

In the packaging method according to the present invention described above, a cold storage agent or the like may be enclosed if necessary. Examples of the cold storage agent include starch-sodium acrylate graft polymer, starch-acrylonitrile graft polymer hydrolyzate, Starch-graft polymer systems such as partially cross-linked starch-poly(meth)acrylic acid copolymers, partially cross-linked starch-polymethyl methacrylate hydrolysates, and salts of the above substances, or methacrylates. Cross-linked synthetic resins, such as the hydrolyzed product of methyl acid-vinyl acetate copolymerization, are known, and any of them can be used, but coolants such as dry ice cannot be used because they cause supercooling. Can not. When the crustacean is shrimp, the temperature at which it is passed through distribution is 15°C or less, preferably 8 to 10°C, and as a cold storage agent, it changes from a gel-like state to a sol-like state in the vicinity of the above temperature range, releasing latent heat. can be used suitably.

<Effects of the Invention> As described above, according to the present invention, since harmful gases generated from fresh crustaceans are removed, the crustaceans can be preserved in a fresh state for a long period of time. In addition, the materials used are inexpensive and can be made by hand, and no special equipment is required, making it suitable for general home delivery.

Claims (1)

[Claims] A method for packaging crustaceans, which comprises mixing a porous material with the cushioning material when housing and packaging the crustaceans in a container filled with a cushioning material.