Modified copolyesters and improved multilayer reflective films

Details Modified copolyesters and improved multilayer reflective films Modified copolyesters and improved multilayer reflective films

2005-09-20

2005-09-20

Chen, Vivian (Department: 1773)

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

C428S480000, C428S910000, C528S302000, C528S305000, C528S307000, C528S308000, C528S308600, C359S485050, C359S487030, C359S494010, C359S506000, C359S577000, C359S586000

Reexamination Certificate

active

06946188

ABSTRACT:
A multilayered polymer film includes a first set of optical layers and a second set of optical layers. The first set of optical layers is made from a polyester which is often birefringent. The polyesters of the first set of optical layers typically have a composition in which 70-100 mol % of the carboxylate subunits are first carboxylate subunits and 0-30 mol % are comonomer carboxylate subunits and 70 to 100 mol % of the glycol subunits are first glycol subunits and 0 to 30 mol % of the glycol subunits are comonomer glycol subunits, where at least 0.5 mol % of the combined carboxylate and glycol subunits are comonomer carboxylate or comonomer glycol subunits. The multilayered polymer film may be used to form, for example, a reflective polarizer or a mirror.

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