Production process for injection-molded product of polyglycolic acid

A process for producing an injection-molded product of polyglycolic acid, comprising the steps of charging an injection molding machine equipped with an injection mold with pellets formed of a thermoplastic resin material which comprises polyglycolic acid having a repeating unit represented by the following formula (1):

• and the following physical properties:
• (a) the melt viscosity, η* (as measured at a temperature of the melting point, Tm of the polymer+20° C., and a shear rate of 1,000/sec) being 30-10,000 Pa·s;
• (b) the melting point, Tm being at least 150° C.;
• (c) the melt enthalpy, ΔHm being at least 20 J/g;
• and
• (d) the density being at least 1.50 g/cm3 as measured in an unoriented, crystallized form;
• and injection-molding the pellets at a cylinder temperature of Tm to 255° C., a mold temperature of 0° C.-Tm and an injection pressure of 1-104 MPa.