| 摘要 |
PROBLEM TO BE SOLVED: To provide a multi-manifold extrusion die that can selectively produce a composite extrudate having an encapsulation arrangement, a full-width arrangement, or a naked-edge arrangement.SOLUTION: An extrusion die has: a first manifold and a second manifold; and an internal deckle system comprising a first internal deckle member and a second internal deckle member received respectively in the first and second manifolds. One of the first and second internal deckle members is positioned further into the extrusion die than the other, and the extrusion die is operated to produce a composite extrudate having either: i) an encapsulated arrangement comprising a core layer and a skin layer having greater width than the core layer such that the skin layer defines lateral edges of the composite extrudate, or ii) a naked-edge arrangement comprising a skin layer and a core layer having greater width than the skin layer such that the core layer defines lateral edges of the composite extrudate. |
