Polarizing structure comprising a glyoxal adhesive system and polarized lens comprising it
AssigneeEssilor International
InventorsPeiqi Jiang, Marvin Pounders
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Abstract
A polarizing structure comprising a polarizing film, a protective film provided on at least one face of the polarizing film with an adhesive layer which is a glyoxal-based adhesive or a water based polymer adhesive such as a PVOH-based adhesive layer, and wherein at least one face of said protective film oriented towards said polarizing film further comprises an adhesion primer structure. The adhesive avoids delamination of the polarizing structure, which withstands edging processing conditions, and which also show excellent dry peel force. Other aspects of the invention relates to a method for manufacturing such a polarizing structure, and a polarized ophthalmic lens comprising such polarizing structure.
Claims9
A polarizing structure comprising:
- a polarizing film having faces;
- and
- a protective film provided on both faces of the polarizing film with an adhesive layer;
- wherein the adhesive layer is a glyoxal-based adhesive obtained from a glyoxal water solution comprising:
- about 5% by weight of glyoxal;
- and
- about 5% by weight of polyvinyl alcohol (PVOH) polymer
- at least one of the protective films comprises PC or PMMA;
- and
- wherein a first face of the at least one protective film is oriented towards the polarizing film and further comprises an adhesion primer structure.
Dependencies are inferred from the claim text.