METHODS OF PRODUCING MULTILAYER REFLECTIVE POLARIZER
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United States of America Patent
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Issued Date -
Mar 1, 2007
app pub date -
Aug 25, 2006
filing date -
Aug 31, 2005
priority date (Note) -
Abandoned
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Abstract
Methods of forming multilayer reflective polarizers are described. One method includes providing a multilayer polymer film having a plurality of alternating polymeric optical layer pairs, heating the multilayer polymer film to a temperature of about or greater than both polymers layer glass transition temperatures to from a heated multilayer film, and stretching the heated multilayer polymer film in an in-plane direction to form a multilayer reflective polarizer. Each first polymer layer includes a first polyester material and each second polymer layer includes a second polyester material that has a different polymer composition than the first polymer layer composition. The stretching includes a uniaxial stretch.
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