METHOD FOR PRODUCING EXTERIOR PART OF ELECTRONIC EQUIPMENT

摘要

PROBLEM TO BE SOLVED: To provide a method for producing exterior parts of electronic equipment, which takes advantage of heat resistance of stereocomplex polylactic acid.

SOLUTION: The method for producing exterior parts of electronic equipment includes injection molding a polylactic acid (component A) having a ratio of melting peak of ≥195°C of ≥80% in melting peaks in a temperature rising process in (A) differential scanning calorimeter (DSC) measurement at a mold temperature of 80-130°C. The polylactic acid comprises a polylactic acid unit (A-1) composed of 90-100 mol% of L-lactic acid unit and 0-10 mol% of D-lactic acid unit and a polylactic acid unit (A-4) composed of 90-100 mol% of D-lactic acid unit and 0-10 mol% of L-lactic acid unit in a weight ratio of (A-1)/(A-4) of 10/90-90/10 and is heat-treated at 245-300°C.

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