Konica Minolta Opto, Inc.

Shinji Inagaki

Noriyasu Kuzuhara

Hiroki Umeda

Takahiro Takagi

Koichi Saito

Isamu Michihata

Koji Tasaka

Minori Tamagawa

A method of producing a long roll retardation film comprising the sequential steps of: (a) casting a film forming material on an endless support to form a long roll film; (b) stretching the long roll film in a lateral direction of the long roll film while both edges of the long roll film are held employing a plurality of clips for each of the edges in a tenter (First Process); (c) reducing distances in the lateral direction between the clips holding the both edges of the long roll film while the edges of the long roll film are held continuously from First Process with the clips (Second Process); (d) enlarging the distances in the lateral direction between the clips holding the both edges of the long roll film while the edges of the long roll film are held continuously from Second Process with the clips (Third Process).

Retardation film, method for producing the same, polarizing plate and liquid crystal display

A cellulose ester film comprising a compound represented by Formula (1): Formula (1) B-(G-A)n-G-B, wherein B represents a benzene monocarboxylic acid residue; G represents an alkylene glycol residue having 2-12 carbon atoms, an aryl glycol residue having 6-12 carbon atoms, or an oxyalkylene glycol residue having 4-12 carbon atoms; A represents an alkylene dicarboxylic acid residue having 4-12 carbon atoms or an aryldicarboxylic acid residue having 6-12 carbon atoms; and n represents an integer of 1 or more.

Cellulose ester film, polarizing plate and liquid crystal display

A polarization plate comprising a polarizer and polarizing plate protective films A and B provided on both surfaces of the polarizer, wherein (i) a thickness of each of the polarizing plate protective films A and B is 30 to 60 &#x3bc;m; (ii) in-plate retardation value Ro of the polarizing plate protective film B is 20 to 100 nm; (iii) retardation value Rt in the thickness direction of the polarizing plate protective film B is 10 to 300 nm; (iv) a thickness of the polarizing plate is 80 to 160 &#x3bc;m; (v) a stiffness of the polarizing plate of the polarizing plate under a condition of 23&#xb0; C. and 55% RH is 20 to 80 g.

Polarizing plate and display device

A film bonded to a polarizer of a polarizing plate, has a surface A and a surface B opposite to the surface A; and a thickness of 10 &#x3bc;m to 70 &#x3bc;m; wherein a refractive index difference between the surface A and the surface B is 5&#xd7;10to 5&#xd7;10.

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Hachioji, Japan

Shinji Inagaki