| abstract |
The present invention relates to a process for producing DVD's using injection molding techniques, without the use of compression, from a polymer having a glass transition temperature (Tg) of greater than 110 °C as measured by Differential Scanning Calorimetry (DSC) at 10 °C/min., an elastic modulus (G') of less than or equal to 1000 dynes/cm2 at a temperature of 240 °C, as measured by Dynamic Mechanical Spectroscopy measurements at a temperature ramp rate of 3 °C/min., and a shear rate of 1 radian/sec using a parallel plate geometry (under nitrogen), and a complex viscosity (Eta*) of less than 2000 poise, as measured according to Dynamic Mechanical Spectroscopy measurements, using shear rate sweeps at 280 °C, and a shear rate of 1 radian/sec using a parallel plate geometry (under nitrogen). |