Patent ID: 8841412

Claim:
A method comprising: providing a bioresorbable polymer resin as feed to an extruder for an extrusion process; passing a drying gas through the polymer resin during the extrusion process prior to being fed into the extruder to remove moisture from the polymer resin, wherein the drying gas has substantially no moisture content prior to passing through the polymer resin; maintaining the moisture content of the polymer resin during the extrusion process prior to being fed into the extruder above a lower limit 50 ppm and below an upper limit of 1000 ppm as the polymer resin is fed into the extruder, wherein the moisture content is maintained above the lower limit to allow for plasticization of polymer resin melt in the extruder which decreases its viscosity which reduces monomer generation and molecular weight loss in the polymer resin melt, wherein the moisture content is maintained below the upper limit reduces molecular weight loss in the polymer resin melt due to hydrolytic degradation; and adjusting the temperature of the drying gas, the flow rate of the drying gas, or both to maintain the moisture content of the polymer resin feed above the lower limit and below the upper limit.