Method for producing porous membrane and drying device of porous membrane
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United States of America Patent
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Dec 27, 2016
Grant Date -
Mar 19, 2015
app pub date -
Mar 12, 2013
filing date -
Mar 12, 2012
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Abstract
The present invention of a method for producing a porous membrane including a solidification step of forming a porous membrane, and a heating step of drying the porous membrane, wherein the heating step includes at least a water reduction step of the porous membrane, the water reduction step uses a heating medium, and the temperature of the heating medium (Tgh) satisfies a relation of tgh>Td, when Td represents the heat deformation temperature of a membrane material. The present invention of a drying device of a porous membrane including a water reduction unit, and a final drying unit, wherein the drying device includes a membrane-surface-temperature measurement means for measuring the surface temperature of the porous membrane and the final drying unit, and a control means for controlling the temperature and/or the flow speed of the heating medium of the water reduction unit.
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