PACKAGING BODY AND PRODUCTION METHOD THEREFOR
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United States of America Patent
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Jun 13, 2024
app pub date -
Mar 11, 2022
filing date -
Mar 31, 2021
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Abstract
A method for producing a packaging body of the present invention includes a production step of producing a metal oxide powder, and a sealing step of placing the metal oxide powder in a bag that is filled with at least one gas selected from the group consisting of a noble gas, nitrogen gas, oxygen gas, and dry air, followed by sealing the bag, the metal oxide powder being a silica powder or a magnesia powder, the bag having a moisture permeability as measured according to JIS Z 0222-1959 of 0.30 g/(m2·day) or less.
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