| abstract |
The invention provides an oriented polyglycolic acid film formed from a thermoplastic resin material which comprises polyglycolic acid having a repeating unit represented by the following formula (1):rties: (a) the melt viscosity, rho * [as measured at a temperature of (the melting point, Tm of the polymer+20 DEG C.) and a shear rate of 100/sec] being 500-100,000 Pa.s; (b) the melting point, Tm being at least 150 DEG C.; (c) the melt enthalpy, DELTA Hm being at least 20 J/g; and (d) the density being at least 1.50 g/cm3 as measured in an unoriented, crystallized form, wherein the film has tensile strength of at least 150 MPa, and production processes thereof. |