In twin screw extrusion process, the island sea model is the coexistent form of the two phase of solid and liquid, which has been seen usually in the melting process of solid pellets.

• 在双螺杆挤出过程中,聚合物颗粒挤出熔融过程中较为常见的一种固、液两相共存的形式可以用“海-岛”模型来描述。