×

METHOD FOR MAKING PEN/PMMA MULTILAYER OPTICAL FILMS

  • US 20090218707A1
  • Filed: 02/23/2009
  • Published: 09/03/2009
  • Est. Priority Date: 01/13/1998
  • Status: Abandoned Application
First Claim
Patent Images

1. A method for making an article, comprising:

  • making a multilayer optical film having alternating polymeric layers formed by coextrusion; and

    incorporating an antistatic additive into the multilayer optical film;

    wherein making the multilayer optical film comprises;

    providing at least a first stream of resin and a second stream of resin;

    providing a feeder tube plate having a first plurality of conduits, and a second plurality of conduits interleaved with the first plurality of conduits;

    feeding the first stream into the first plurality of conduits and the second stream into the second plurality of conduits;

    providing a slot die for each of the first and second plurality of conduits such that the first and second streams are divided into a plurality of interleaved layers to yield a composite stream;

    passing the composite stream through an extrusion die to form a multilayer web in which each layer is generally parallel to the major surface of adjacent layers; and

    heating the first and second streams of resin with at least one axial rod heater.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×