| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a production method by which resin particles satisfying both of nonconventionally excellent heat-resistant preservability and melting properties are obtained. <P>SOLUTION: The method for producing resin particles (X) includes: a step where resin particles (B) containing a resin (A) composed of a crystalline moiety (a) in which ≥85 wt.% of the constituents is a polyamide (p) and a non-crystalline moiety (b) are treated with carbon dioxide (C) in a liquid or supercritical state, and then the carbon dioxide (C) is removed. The heat of fusion of the resulting resin particles (X) measured by differential scanning calorimetry (DSC) satisfies the relational expression (1): 0≤H2/H1≤0.9, wherein H1 represents a measured value of heat of fusion (J/g) in the first temperature rising by DSC measurement; and H2 represents a measured value of heat of fusion (J/g) in the second temperature rising by DSC measurement. <P>COPYRIGHT: (C)2012,JPO&INPIT |
