A method for manufacturing a preform assembly may included extruding a film through an extrusion die and translating a preform assembly so that a current layer for the preform is stacked on top of a previous lawyer of the preform. The extrusion die may have various features such as multiple inputs with a single stream output. A roller and a cutter may also be used as part of the layer stacking. The method may also take place in a enclosure with environment or temperature controls.

The wet masterbatch production line based on high-speed impinging stream reaction is provided, and includes: the mixing unit, configured for mixing and standing carbon black and latex to obtain granular rubber material; the dehydration unit, configured for performing dehydrating treatment on granular rubber material after standing to obtain flocculent rubber material; the conveying and refining unit, configured for conveying and refining dehydrated flocculent rubber material to obtain sheet rubber material; the cooling treatment unit, configured for cooling, and folding and stacking refined sheet rubber material; and the control unit, configured for automatically controlling the mixing unit, the dehydration unit, the conveying and refining unit and the cooling treatment unit. The working state of the extrusion-dehydration-expansion-drying integrated machine is accurately controlled, so that the rubber material generates heat at a certain internal pressure, a certain stirring rotating speed and a certain shearing speed.