| 摘要 |
PROBLEM TO BE SOLVED: To retain freshness of a fresh mushroom by disposing it on a tray and packing it with a plastic film and eliminating the discoloration of the fresh mushroom, the generation of mildews or the decomposition of the mushroom or its unnecessary drying and the like, when the packed mushroom is preserved, stored, exhibited or conveyed. SOLUTION: A polyethylene resin with an added 3% zinc oxide is laminated in the thickness of 0.025 mm on one side of a wooden fiber sheet with a basis weight of 60 g/m<SP>2</SP>. In addition, the obtained laminated sheet is perforated, showing a large number of micropores with a bore of about 0.3 mm and then is cut to the 80 mm square. After that, two pieces of the cut sheet are lapped over each other, setting their laminating sides mutually inward and the three sides of the lapped sheets are heat-sealed. Further, a mixture of 10 g of silica gel and 0.5 g of calcium chloride is injected into the gaps of the three sides and finally, the remaining one side is heat-sealed. COPYRIGHT: (C)2003,JPO
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