Multi-Manifold Extrusion Die with Deckle System and Method of Using Same

摘要

A multi-manifold extrusion die having a fully independent internal deckle system. The die can selectively produce a composite extrudate having a full-width arrangement, an encapsulation arrangement, or a naked-edge arrangement. Methods are also provided for producing a composite extrudate having a full-width arrangement, an encapsulation arrangement, or a naked-edge arrangement.

主权项

1. An extrusion die having first and second manifolds, converging first and second internal flow passageways extending respectively from said first and second manifolds, a downstream flow channel extending from a convergence of said first and second internal flow passageways, an outlet orifice, and an internal deckle system, said internal deckle system having an encapsulation position, a full-width position, and a naked-edge position, said internal deckle system when in said encapsulation position configuring said extrusion die to produce an encapsulated composite extrudate comprising a core layer and a skin layer of greater width than the core layer such that the skin layer defines lateral edges of the composite extrudate, said internal deckle system when in said full-width position configuring said extrusion die to produce a full width composite extrudate comprising a core layer and a skin layer both extending over a full width of the composite extrudate, said internal deckle system when in said naked-edge position configuring said extrusion die to produce a naked edge composite extrudate comprising a skin layer and a core layer of greater width than the skin layer such that the core layer defines lateral edges of the composite extrudate.