Polarizing plate and eyewear plastic article containing the same
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United States of America Patent
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N/A
Issued Date -
Nov 11, 2004
app pub date -
Dec 22, 2003
filing date -
Dec 20, 2002
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A polarizing plate is formed with a non-polyvinyl alcohol based polarizing film, a thermoplastic support layer bonded to one surface of the polarizing thin layer, and a thermoplastic protective layer bonded to the other surface of the polarizing thin layer. The thermoplastic support layer is constructed from the same or similar material as the eyewear plastic article base. The thermoplastic protective layer is constructed from a resin sheet that is non-birefringent or highly birefringent. The polarizing plate can be advantageously used in eyewear articles such as sunglasses and goggles for glare reduction. The polarizing plate can be more advantageously used for the production of eyewear optical articles through an insert injection molding technique due to its high heat stability and moisture resistance.
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