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:
Dec. 25, 2001
Filed:
Jan. 29, 1996
Marja Ora, Vantaa, FI;
Esa Suokas, Tampere, FI;
Mika Härkönen, Vantaa, FI;
Seppo Kuusela, Porvoo, FI;
Erkki Laiho, Porvoo, FI;
Optatech Corporation, Espoo, FI;
Abstract
The present invention concerns a multilayered polymer film structure, which comprises at least one first layer (,) containing a thermoplastic polymer and at least one second layer (,), arranged adjacent to said first layer, containing a liquid crystalline polymer. According to the invention, the second layer (,) consists essentially of a compounded polymer blend formed by the liquid crystalline polymer and a thermoplastic polymer, the liquid crystalline polymer of the second layer forms a continuous phase, and the first and the second layers (,) contain the same thermoplastic polymer. The oxygen transmission rate of the second layer is less than about 150 cm,/(m,·d·bar), determined according to the standard ASTM D 3985-81, and the water vapour transmission rate of the integral film structure is less than 10 g/(m,·24·h) at RH 80% 23° C., determined according to ASTM F 1249-90. The present structure can be used as a barrier layer in packages.