The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 23, 1999
Filed:
Jan. 16, 1997
Edward M Bullard, Rochester, NY (US);
Thomas A White, Farmington, NY (US);
Tenneco Packaging, Evanston, IL (US);
Abstract
A polymeric multilayer film is disclosed that has improved optical qualities while having structural qualities that are not significantly compromised. The film is composed of outer film layers of a low polydispersity polymer which are placed around at least one inner film layer of a high molecular weight high density polyethylene (HDPE) polymer. The outer film layer polymer has a polydispersity of from about 1 to about 4. In a preferred embodiment this low polydispersity polymer is formed in the presence of a metallocene catalyst. The inner film layer high molecular weight HDPE polymer has a melt index of less than 0.1 and a density of at least about 0.940 g/cm.sup.3. Any of the layers of the film may be constructed of polymer blends.