Polyester film for releasing polarizer

Details Polyester film for releasing polarizer Polyester film for releasing polarizer

2005-01-04

2005-01-04

Chang, Audrey (Department: 2872)

Optical: systems and elements

Polarization without modulation

By relatively adjustable superimposed or in series polarizers

C359S483010, C359S492010, C359S506000, C428S040100, C428S041700, C428S041800, C428S352000, C428S354000, C428S480000, C428S483000

Reexamination Certificate

active

06839171

ABSTRACT:
A film for releasing a polarizing plate, which has excellent transparency, silicone adhesion and processing work efficiency, and a small orientation angle, contains little optical foreign matter and is hardly scratched.This film comprises a coextruded polyester film comprising at least two layers and a silicone adhesive layer. The coextruded polyester film has a haze value of 4% or less and an orientation angle of 10° C. or less and contains 5 or less flyspecks having a long diameter of 90 μm or more per 0.3 m2.

REFERENCES:
patent: 3799919 (1974-03-01), Gibbon
patent: 5677024 (1997-10-01), Abe et al.
patent: 47-34447 (1972-11-01), None
patent: 52-40918 (1977-10-01), None
patent: 2000-141568 (2000-05-01), None
patent: 2000-159910 (2000-06-01), None
patent: 2000-338327 (2000-12-01), None
International Publication (WO02/056065) w/International Search Report and PCT Rule 47.1(c) Notice PCT/IB/308), dated Jul. 18, 2002.

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