| 摘要 |
PURPOSE:To obtain the title packaging material with air permeability and moisture absorptivity, to be used for preserving vegetables, fruits, petals, fresh fishes, meats, etc., for a long period, by incorporating a raw paper with powder or muddy product of natural minerals-ceramics consisting mainly of silicic acid followed by forming into a sheet-like or board-like product. CONSTITUTION:A raw paper is incorporated with powder or muddy product of natural minerals-ceramics consisting mainly of silicic acid, containing trace amounts of heavy metals and rare earth metals in an amount of pref. 5-50wt.%, followed by forming into a sheet-like or board-like product (pref. a corrugated board), thus obtaining the objective packaging material. In the case of corrugated paper, said natural minerals-ceramics may be incorporated into the interior paper alone. |
