PROBLEM TO BE SOLVED: To provide a sheet-formed catalyst that efficiently decomposes ethylene, in order to maintain the freshness of plants packed in box for storage or transportation.SOLUTION: Provided is a sheet-shaped freshness preserving catalyst that is spread and used in a preservation or transportation container, or that is used by wrapping plant, and that is produced by immersing an activated charcoal-kneaded sheet-shaped material, or an active carbon fiber sheet, in an aqueous solution of silver nitrate for 2 to 6 hours, thoroughly removing the solution, followed by drying at room temperature or at 80 to 150°C.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2020,JPO&INPIT【課題】保存あるいは輸送用に箱詰めされた植物の鮮度を保持するため、エチレンを効率よく分解するシート化した触媒の提供。【解決手段】保存あるいは輸送用容器内に広げて使用、もしくは植物を包んで使用するシート状鮮度保持触媒であって、活性炭を練りこんだシート状素材、もしくは活性炭素繊維シートを硝酸銀水溶液に２～６時間浸漬し、溶液をよく除去した後、室温あるいは８０～１５０℃で乾燥して製造するシート状鮮度保持触媒。【選択図】図１
