| 摘要 |
A process for the production of relatively very small, uniform, substantially spherical foamable or expandable beads or pellets comprising a polyphenylene ether resin, alone or combined with an alkenyl aromatic polymer, and a blowing agent, wherein the resin is melted and mixed and the blowing agent is introduced thereto in an extruder before being passed to a heated die comprising a die face having a plurality of groups or pods each pod comprising a plurality of extrusion exits. Blades move over the die face and cut the emerging extrusion. The die face is in contact with water or other suitable fluid which cools the melt and carries the beads from the die face to an area where the beads are removed from the water and dried. |
