Patent ID: 6649247
Filing Date: 2003-11-18
Classification: B32B,Y10S,Y10T

Abstract:
A sealable, flame-retardant, coextruded, biaxially oriented polyester film with one matt side and with at least one base layer B based on a thermoplastic polyester, and with a sealable outer layer A, and also with a matt outer layer C, wherein a flame retardant is present in at least one layer, wherein the sealable outer layer A has a minimum sealing temperature of about 110Â° C. and a seal seam strength of at least 1.3 N/15 mm, and the topographies of the two outer layers A and C have the following features:Sealable outer layer A: R3Value measured for gas flow from about 500 to about 4000 s Non-sealable, matt outer layer C: about 200 nmaValue measured for gas flow