Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – Reshaping running or indefinite-length work
Reexamination Certificate
2004-10-01
2010-11-16
Nguyen, Khanh (Department: 1791)
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
Reshaping running or indefinite-length work
C264S291000, C264S134000
Reexamination Certificate
active
07833457
ABSTRACT:
A birefringent film with excellent uniformity in in-plane retardation, retardation in the thickness direction, and alignment axis is provided. The birefringent film is produced in such a manner that, in the step of stretching a polymer film, the polymer film is stretched in a width direction while being shrunk in a longitudinal direction, and assuming that lengths in the width direction and the longitudinal direction of the polymer film before being stretched are 1, a change ratio (STD) of the length in the width direction of the polymer film resulting from the stretching and a change ratio (SMD) of the length in the longitudinal direction of the polymer film resulting from the shrinking satisfy the following formula (1).in-line-formulae description="In-line Formulae" end="lead"?(1/STD)1/2≦SMD<1 (1)in-line-formulae description="In-line Formulae" end="tail"?
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Ishibashi Kuniaki
Tsuchimoto Kazuki
Yoshimi Hiroyuki
Huda Saeed M
Nguyen Khanh
Nitto Denko Corporation
Westerman Hattori Daniels & Adrian LLP
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