ORIENTED POLYGLYCOLIC ACID FILM AND PRODUCTION PROCESS THEREOF

摘要

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): <CHEM> and the following physical properties: (a) the melt viscosity, eta * Äas measured at a temperature of (the melting point, Tm of the polymer + 20 DEG C) and a shear rate of 100/secÜ being 500-100,000 Pa.s; (b) the melting point, Tm being at least 150 DEG C; (c) the melt enthalpy, AHm being at least 20 J/g; and (d) the density being at least 1.50 g/cm<3> as measured in an unoriented, crystallized form, wherein the film has tensile strength of at least 150 MPa, and production processes thereof.