Coextruded, hot-sealable and peelable polyester film having...

Details Coextruded, hot-sealable and peelable polyester film having... Coextruded, hot-sealable and peelable polyester film having...

2007-03-06

2007-03-06

Chen, Vivian (Department: 1773)

Stock material or miscellaneous articles

Structurally defined web or sheet

Continuous and nonuniform or irregular surface on layer or...

C428S334000, C428S336000, C428S346000, C428S347000, C428S349000, C428S3550RA, C428S323000, C428S480000, C428S910000, C528S302000, C528S308000, C528S308600, C528S308700, C264S288400, C264S290200, C525S165000, C525S173000, C525S174000, C525S177000, C525S419000, C525S420000, C525S425000, C525S437000, C525S444000

Reexamination Certificate

active

10953414

ABSTRACT:
This invention relates to a coextruded, transparent, biaxially oriented polyester film comprising a base layer (B) and a heatsealable top layer (A) which is peelable from at least the APET side of an APET/CPET tray, the heatsealable and peelable top layer (A) consisting ofa) 50–95% by weight of polyester andb) 5–40% by weight of a polyester-incompatible polymer (=anti-PET polymer)based on the mass of the top layer (A), whereinc) the polyester is composed of 20–95 mol % of units derived from at least one aromatic dicarboxylic acid and 5–80 mol % of units derived from at least one aliphatic dicarboxylic acid, andd) the layer thickness dAis from 1.3 to 3.0 μm.The invention further relates to a process for producing the film and to its use.

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