METHOD FOR PRODUCING RECYCLED DEVELOPER AND METHOD FOR PRODUCING FLEXOGRAPHIC PRINTING PLATE USING SAME
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United States of America Patent
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Issued Date -
Mar 14, 2024
app pub date -
Mar 7, 2022
filing date -
Mar 19, 2021
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Abstract
A method is disclosed for producing a recycled developer from a waste developer generated by development of a water-developable flexographic printing original plate that has a photosensitive resin layer made from a photosensitive resin composition containing a water-dispersible resin. The method includes: leaving the waste developer to stand still in a tank so as to emerge and flocculate the photosensitive resin composition dispersed in the waste developer and thus form a solid-liquid mixed phase containing a resin flocculate beneath a liquid surface of the waste developer; and discharging the solid-liquid mixed phase containing the resin flocculate from an outlet formed on a side surface of the tank and obtaining, as a recycled developer, a liquid left in the tank, characterized in that a level of the waste developer in the tank at the time of starting the discharge is higher than the lowest position of an aperture of the outlet.
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