B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
B29C 47/06 (2006.01) B29C 47/78 (2006.01) B29C 47/92 (2006.01) B32B 31/30 (1990.01)
Patent
CA 2050154
ABSTRACT OF THE DISCLOSURE Method, apparatus, and films, related to coextrusion of heat-sensitive polymer materials, The sensitive melt stream element (12) is encapsulated in a second polymeric melt stream element (16). Transport means (363 is preferably employed between the encapsulating means (20) and the die (42). A third melt stream element (68) is joined to one or both opposing surfaces (70) of the second melt stream element (16) between the encapsulating means (20) and the die (42). In the die (42) the encapsulated melt stream element (12) becomes an interior layer (46) between encapsulating layers (48A, 48B) derived from the second melt stream element (16). The third melt stream element (68) forms layers (72, 74) positioned outwardly of the encapsulating layers (48A, 48B). The positioning, on the interior of the extrudate, of edges (54) of layer (46) is adjusterd independently of the combined thicknesses of a layer derived from the third melt stream element (68) and an adjacent layer (48).
Blemberg Robert John
Curie Kevin J.
Eckstein John Paul
Blemberg Robert John
Curie Kevin J.
Eckstein John Paul
Marks & Clerk
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