| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a powder classification method enabling stable manufacture. <P>SOLUTION: In the powder classification method in which gas constituted by dispersing powder comprising at least one kind of thermoplastic resin or powder including at least one kind of thermoplastic resin is flown along flow channels 3, 4, 5, the powder is classified by the flow channel being separated to a plurality of flow channels, the thermoplastic resin is non-crosslinked polyester resin with a softening point of 112°C or below, and the powder contains a compound represented by a general formula (1) [wherein R<SP POS="POST">1</SP>is ≥10C alkyl or alkoxy; R<SP POS="POST">2</SP>is -X-COOR<SP POS="POST">3</SP>(X is alkylene; R<SP POS="POST">3</SP>is ≥10C alkyl) or ≥10C alkyl]. <P>COPYRIGHT: (C)2012,JPO&INPIT |
