Patent ID: 8362198

Claim:
A method for producing a resin particle (X2), comprising: mixing a solution (L) of a resin (A2) in a solvent (S) with liquid or supercritical carbon dioxide (C), wherein the resin (A2) is a block polymer made of a resin constituting a crystalline part (a2) and a resin constituting a noncrystalline part (b), wherein as an essential constitutional component, the resin (a2) is a polyester (p2) containing an aromatic ring and produced by polycondensation of a polyol component and a polycarboxylic acid component, wherein the resin constituting the noncrystalline part (b) has a glass transition temperature of 40 to 250° C.; forming a resin particle (B′) containing (A2) and (S) in (C); removing (C) and (S), and obtaining the resin particle (X2), wherein a heat of fusion measured by differential scanning calorimetry (DSC) of the obtained (X2) satisfies the following relational formula (1): 0 ≦H 2 /H 1≦0.9 (1) [wherein H1 represents a measurement value of a heat of fusion (J/g) at the time of the initial temperature elevation measured by DSC; and H2 represents a measurement value of a heat of fusion (J/g) at the time of the second temperature elevation measured by DSC], wherein the resin (A2) satisfies {Requirement 2}|Log G″(x+20)−Log G″(x)|>2.0 [G″: loss elastic modulus [Pa]].