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Multilayer polymeric film

  • US 5,006,394 A
  • Filed: 06/23/1988
  • Issued: 04/09/1991
  • Est. Priority Date: 06/23/1988
  • Status: Expired due to Term
First Claim
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1. A substantially void-free polymeric multilayer film which exhibits an opaque appearance without being stretched, said polymeric multilayer film comprising:

  • (a) at least one relatively thick base layer comprised substantially of a polymer, said base layer having a thickness comprising at least about 80 percent of the total thickness of said multilayer film; and

    (b) at least one relatively thin filler containing polymeric layer substantially continuously joined to said base layer, said filler containing polymeric layer having about 15 to about 60 weight percent fillers substantially uniformly dispersed therein, said filler containing layer having a thickness not exceeding about 20 percent of the total thickness of said multilayer film, whereby said fillers in said relatively thin filler containing polymeric layer scatter the light rays incident upon said multilayer film to produce said opaque appearance in said multilayer polymeric film without significantly detracting from the material properties of said base layer.

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