Adhesion-promoted , heatsealable and peelable polyester...

Details Adhesion-promoted , heatsealable and peelable polyester... Adhesion-promoted , heatsealable and peelable polyester...

2008-07-08

2008-07-08

Chen, Vivian (Department: 1794)

Stock material or miscellaneous articles

Structurally defined web or sheet

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

C428S215000, C428S216000, C428S334000, C428S335000, C428S336000, C428S323000, C428S347000, C428S349000, C428S3550RA, C428S480000, C428S910000, C525S437000, C525S444000, C528S302000, C528S308000, C528S308600, C528S308700, C264S171160, C264S171190, C264S288400, C264S290200

Reexamination Certificate

active

10984727

ABSTRACT:
Coextruded, biaxially oriented polyester films which have a base layer (B) and have a heatsealable outer layer (A) that can be peeled from APET/CPET and from CPET, where the outer layer (A) includesa) from 60 to 99% by weight of polyester andb) from 1 to 10% by weight of inorganic and/or organic particles with a median diameter d50of from 2 to 8 μm,and wherec) the polyester is composed of from 12 to 89 mol % of units derived from at least one aromatic dicarboxylic acid and of from 11 to 88 mol % of units derived from at least one aliphatic dicarboxylic acid,and the non-sealable surface of the film has been rendered adhesion-promoting. The films of the invention are suitable as a packaging material for foods and other consumable items, and as a lid film for APET/CPET or CPET trays.

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