| 摘要 |
<p>PURPOSE:To prevent the wilting and deterioration of a perishable food and retain the freshness thereof, by housing a frozen material of a hydrated highly absorbing polymer together with the perishable food in a container, reducing the material temperature of the perishable food and keeping the humidity at an optimum value. CONSTITUTION:Water in an amount of preferably 50-500 times based on a highly water absorbing polymer, preferably a highly water absorbing polymer, e.g. post-crosslinked polyacrylic acid salt, etc., contained in a sheetlike structure, e.g. paper, is absorbed therein and frozen preferably at <=-10 deg.C to give a frozen material, which is, together with a peroishable food, e.g. vegetable, is housed in a container to keep the freshness thereof.</p> |
