US 12,391,903 B2
Cleaning liquid for excessive powder removal, method for producing three-dimensional molded object, and set of object molding liquid and cleaning liquid
Yuki Shingai, Kanagawa (JP)
Assigned to Ricoh Company, Ltd., Tokyo (JP)
Filed by Yuki Shingai, Kanagawa (JP)
Filed on Mar. 10, 2023, as Appl. No. 18/182,014.
Claims priority of application No. 2022-039185 (JP), filed on Mar. 14, 2022.
Prior Publication US 2023/0287311 A1, Sep. 14, 2023
Int. Cl. C11D 7/50 (2006.01); B29C 64/35 (2017.01); B33Y 40/20 (2020.01); C09D 7/20 (2018.01); C09D 131/04 (2006.01); C09D 139/06 (2006.01); C11D 7/24 (2006.01); B29C 64/165 (2017.01)
CPC C11D 7/5027 (2013.01) [B29C 64/35 (2017.08); B33Y 40/20 (2020.01); C09D 7/20 (2018.01); C09D 131/04 (2013.01); C09D 139/06 (2013.01); C11D 7/241 (2013.01); C11D 7/245 (2013.01); B29C 64/165 (2017.08); C11D 2111/18 (2024.01)] 20 Claims
OG exemplary drawing
 
1. A method for producing a three-dimensional molded object, the method comprising:
forming a powder layer containing a powder for molding;
applying an object molding liquid containing a resin to the powder layer to form a molded object;
solidifying the molded object to obtain a solidified object; and
removing excessive powder for molding adhering to the solidified object with a cleaning liquid containing a hydrocarbon solvent having an octanol/water partition coefficient (logPow value) of 4.5 or more,
wherein the resin is soluble in a solvent A, and an octanol/water partition coefficient (logPow value) of the solvent A is −1.8 or more and 3.4 or less.