| US 7,550,198 B2 | ||
| Multilayer sealable film having a temperature-resistant layer therein | ||
| Robert E Chambliss, Trussville, Ala. (US); and Paul Z Wolak, Indianapolis, Ind. (US) | ||
| Assigned to Pliant Corporation, Schaumburg, Ill. (US) | ||
| Filed on Oct. 16, 2007, as Appl. No. 11/873,162. | ||
| Application 11/873162 is a continuation of application No. 11/119672, filed on May 02, 2005, granted, now 7,282,258. | ||
| Prior Publication US 2008/0113131 A1, May 15, 2008 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. B32B 27/08 (2006.01); B32B 27/30 (2006.01); B32B 27/32 (2006.01) | ||
| U.S. Cl. 428—349 [428/220; 428/336; 428/515; 428/516; 428/520] | 18 Claims |
| 1. A multilayer film comprising:
(a) a sealable outer layer comprising at least one ethylene-methacrylic acid copolymer;
(b) a first heat-resistant layer comprising high density polyethylene or polypropylene;
(c) a core layer comprising at least one polyolefin polymer; and
(d) a second heat-resistant layer comprising high density polyethylene, wherein said core layer is positioned between said
first and second heat-resistant layers, and further wherein said sealable outer layer is positioned such that said first heat-resistant
layer is positioned between said sealable outer layer and said core layer.
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