×

Multilayer shrink film with polystyrene and polyethylene layers

  • US 7,192,636 B2
  • Filed: 12/09/2003
  • Issued: 03/20/2007
  • Est. Priority Date: 12/10/2002
  • Status: Active Grant
First Claim
Patent Images

1. A five layer shrink film comprising:

  • a first outer polyethylenic layer;

    a second outer polyethylenic layer;

    a core polystyrenic layer comprising from 70% to 75% by weight styrene homopolymer or α

    -methylstyrene homopolymer, from 10% to 15% by weight polystyrene toughener, from 10% to 20% by weight adhesive resin, and from 5% to 6% by weight slip additive;

    a first polystyrene compatibilizing layer between the core polystyrenic layer and the first outer polyethylenic layer; and

    a second polystyrene compatibilizing layer between the core polystyrenic layer and the second outer polyethylenic layer;

    wherein the polystyrene compatabilizing layers comprise less than 1% by weight substantially random interpolymer.

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