Freshness keeping sheet
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United States of America Patent
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Jul 25, 1995
Grant Date -
N/A
app pub date -
Nov 22, 1994
filing date -
Nov 22, 1993
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A freshness keeping sheet comprises: 100 parts by weight of a palladium chloride-carrying activated carbon obtained by activating a carbon material under an atmosphere containing not more than 15% by volume of water vapor and cooling the activated carbon material to not more than 300.degree. C. under the same atmosphere and then permitting the resulting activated carbon to carry 0.1 to 10% by weight of palladium chloride, and 1 to 20 parts by weight of a synthetic fiber having a single fiber diameter of 1 to 30 .mu.m as a binder, said palladium chloride-carrying activated carbon and said synthetic fiber having been mixed and integrally molded into a sheet. The sheet can rapidly remove thin ethylene from a gas even at low temperatures and is hence excellent as a freshness keeping sheet for refrigerators and vegetables and fruits storing boxes.
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