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...

2006-11-28

2006-11-28

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, C525S165000, C525S173000, C525S174000, C525S177000, C525S437000, C525S444000, C528S302000, C528S308000, C528S308600, C528S308700, C264S288400, C264S290200

Reexamination Certificate

active

07141293

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 APET, the heatsealable and peelable top layer (A) consisting ofa) 60–97% by weight of polyester andb) 3–30% by weight of a polyester-incompatible polymer (=anti-PET polymer),based on the mass of the top layer (A), whereinc) the polyester being composed of 25–95 mol % of units which derive from at least one aromatic dicarboxylic acid and 5–75 mol % of units which derive from at least one aliphatic dicarboxylic acid, the sum of the dicarboxylic acid-derived molar percentages being 100, andd) the layer thickness of the top layer (A) dAbeing from 0.7 to 2.5 μm.

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