Resin powder for solid freeform fabrication, device for fabricating solid freeform fabrication object, and resin powder

A rein powder, comprising:

• a polyolefin, polyarylketone, polyphenylene sulfide, liquid crystal polymer, polyacetal, polyimide, and/or fluorochemical resin;
• a hindered phenol-based compound, a phosphorus-containing compound, a sulfur-containing compound, and/or copper acetate,
• wherein the powder has an Mv/Mn ratio of 2.00 or less, My being a volume average particle diameter and Mn being a number average particle diameter,
• wherein the powder has a melting point of 100° C. or higher as measured according to ISO 3146 regulation and a ratio of melt mass-flow rate B to melt mass-flow rate A of greater than 0.80 to 1.20, and
• wherein the melt mass-flow rate A and the melt mass-flow rate B are respectively measured at 15° C. higher than the melting point under a load of 2.16 kg according to JIS K7210 format before and after the resin powder is maintained at a temperature 15° C. lower than the melting point under a pressure of 0.1 kPa for four hours.