Biaxially oriented polyester film which is matt on one side...

Details Biaxially oriented polyester film which is matt on one side... Biaxially oriented polyester film which is matt on one side...

2005-07-05

2005-07-05

Chen, Vivian (Department: 1773)

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Including a second component containing structurally defined...

C428S480000, C428S910000, C264S288400, C264S290200, C528S302000, C528S308000, C528S308100, C528S308600

Reexamination Certificate

active

06913817

ABSTRACT:
Biaxially oriented polyester films which have a polyester-containing base layer (B) and a matt overlayer (A), and are characterized by the following features: a) the transverse shrinkage of the film is between 1 and 2.3%, b) the transverse linear expansion of the film during thermo-mechanical analysis is smaller than or equal to 0.2%, c) the matt overlayer comprises particles, preferably SiO2, whose median diameter is from 2 to 10 μm and whose SPAN98 is smaller than or equal to 2, and d) the matt overlayer (A) comprises a polyester which has from 4 to 30 mol % of isophthalic acid units are notable in particular for low opacity, high transparency and low gloss of the overlayer (A), and are therefore suitable as flexible packaging films and for the purposes of hot lamination.

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