| 摘要 |
Processes and apparatus for melt extrusion of polymeric compositions, particularly conductive polymers, in which a gear pump (3) delivers molten polymeric composition to an extrusion orifice (41). Overfeeding of the composition due to pressure variations is avoided by means of a polymer relief means (5), preferably a second, smaller gear pump (5), which removes a portion of the molten composition when the pressure exceeds a selected level. |
