METHOD FOR PRODUCING RECYCLED DEVELOPER, AND METHOD FOR PRODUCING FLEXOGRAPHIC PRINTING PLATE USING SAME

WIPO Patent Application WO/2022/196406

A1

[Problem] To provide a method for easily producing a recycled developer by flocculating and separating a photosensitive resin composition from a waste developer of a water-developable flexographic printing plate. [Solution] A method for producing a recycled developer from a waste developer produced by the development of a water-developable flexographic printing plate having a photosensitive resin layer comprising a photosensitive resin composition that contains a water-dispersible resin, the method including a step in which the waste developer is left to stand in a tank, and a photosensitive resin composition dispersed in the waste developer is made to emerge/flocculate to form a solid/liquid mixed phase containing a flocculated resin below the surface of the waste developer, and a step in which the solid/liquid mixed phase containing the flocculated resin is discharged from a discharge port positioned in a side surface of the tank, and the fluid left in the tank is obtained as the recycled developer, wherein the height of the surface of the waste developer in the tank when the discharging is started is greater than the height of the lowest position of an opening of the discharge port.

MOTOI KEIICHI (JP)
YOSHIOKA DAIKI (JP)

PCT/JP2022/009590

September 22, 2022

March 07, 2022

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TOYO BOSEKI (JP)

B41C1/00; B41N1/00; G03F7/00; G03F7/32

WO2018061958A1	2018-04-05
WO2018061958A1	2018-04-05

JPH06194824A	1994-07-15
JP2011232407A	2011-11-17
JPH06194824A	1994-07-15
JP2011232407A	2011-11-17

KAZAHAYA, Nobuaki et al. (JP)

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