To lengthen a duration while sufficiently holding preservative effects and to prevent adverse influence to a taste of food by soaking a water-absorbing fiber material in a salt solution and drying it.
A water-absorbing fiber material is soaked in a salt solution and dried to provide a salt-containing-sheet-like material for packaging food. The salt-containing-sheet-like material is laminated on a surface of a base 3 and press-molded into a recess, and this is laminated on a sheet-like material 1 to form a food tray. Thus, excellent effects can be exhibited in preservation of food and holding a taste, and freshness of the food can be preserved, rot can be prevented, and the food can be preserved for a long time. In addition, holding of a taste is also remarkably excellent.
YOKOYAMA YOSHITO
WATANABE YASUMITSU
KAKEYA YUKITERU
