ADHESIVE FILM HAVING A PHASE DIFFERENCE, METHOD FOR MANUFACTURING SAME, AND OPTICAL MEMBER INCLUDING SAME
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United States of America Patent
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Issued Date -
Oct 23, 2014
app pub date -
Jul 3, 2012
filing date -
Sep 8, 2011
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Abstract
According to the present invention, an adhesive film having a phase-difference is characterized by a phase difference value of 25° C./55% RH at a thickness of 20 μm being approximately 20 nm to approximately 150 nm, and 1 rad/s storage modulus by a frequency seep test at 30° C. being approximately 105 dyne/cm2 to approximately 109 dyne/cm2. The adhesive film having a phase-difference exhibits minimal entangling and retains a stretched structure under high temperature and humidity so as to provide an optical member that has decreased light leakage, retains superior durability, reworkability, and adhesion, and has an excellent balance of physical properties.
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