Closed die array for multi-layered articles

Details Closed die array for multi-layered articles Closed die array for multi-layered articles

2005-08-30

2005-08-30

Lechert, Jr., Stephen J. (Department: 1732)

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

C264S211230, C264S216000, C264S241000, C264S209100

Reexamination Certificate

active

06936203

ABSTRACT:
An array of dies having a closed configuration is used in a method and apparatus for making a closed composite article that comprises multilayered materials. In the method and apparatus, at least two extruders are used to extrude at least two material streams through the die array to provide an extrudate comprised of alternate layers of material from the at least two material streams. The compositions in the two material streams can be the same or different.

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patent: 5866265 (1999-02-01), Reilly et al.
patent: 6159613 (2000-12-01), Reilly et al.
patent: 492890 (1992-07-01), None
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patent: 9936248 (1999-01-01), None
Polymer Engineering and Science, Feb. 1997, vol. 37, No. 2, pp. 355-362, Chad D. Mueller, Sergei Nazarenko, Thomas Ebeling, Thomas L. Schuman, Anne Hiltner and Eric Baer, Novel Structures by Microlayer Coextrusion-Talc-Filled PP, PC/SAN, and HDPE/LLDPE.

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