Polarizing plate laminated with an improved glue composition...

Details Polarizing plate laminated with an improved glue composition... Polarizing plate laminated with an improved glue composition...

2008-07-15

2008-07-15

Goff, John L (Department: 1791)

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

C156S308600, C156S324400, C359S490020, C359S506000

Reexamination Certificate

active

11028036

ABSTRACT:
The present invention generally relates a method of forming a polarizing plate comprising providing two protective cover sheets, each protective cover sheet for polarizers comprising a low birefringence protective polymer film and a layer promoting adhesion to poly(vinyl alcohol)-containing films comprising a hydrophilic polymer. The cover sheets are brought into contact with a PVA dichroic polarizing film such that said layer promoting adhesion to poly(vinyl alcohol)-containing films in each of said two cover sheets is in contact with said PVA dichroic polarizing film. A glue composition is applied just before contacting said PVA dichroic polarizing film and said cover sheets, said glue composition being substantially free of dissolved polymer and comprising a crosslinking agent that crosslinks PVA.

REFERENCES:
patent: 2143791 (1939-01-01), Nadeau
patent: 2362580 (1944-11-01), Nadeau et al.
patent: 4619793 (1986-10-01), Lee
patent: 6840635 (2005-01-01), Maeda et al.
patent: 2002/0145801 (2002-10-01), Tsuchimoto et al.
patent: 2003/0096093 (2003-05-01), Sakamaki
patent: 2003/0215621 (2003-11-01), Bermel
patent: 1 450 012 (1976-09-01), None
patent: 06094915 (2002-03-01), None
patent: 2002090546 (2002-03-01), None
Machin Translation for JP 2002090546 Aug. 2007.
Machine Translation for JP 06094915 Aug. 2007.
Abstract for JP 06094915, date unknown.

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