Konica Corporation

Konica Minolta Opto, Inc.

Konica Minolta, Inc.

Mitsubishi Kasei Corporation

Mitsubishi Chemical Corporation

Konica Corporation and Mitsubishi Chemical Corporation

Kunio Shimizu

Isamu Michihata

Shigeki Oka

Takashi Takebe

Toru Kobayashi

Nobumasa Sasa

Takashi Murakami

Noriki Tachibana

Koichi Nagayasu

Masahito Takada

Manabu Watanabe

Shinya Mayama

Tetsuya Masuda

Kazuaki Nakamura

Toshiyuki Urano

Akihiko Takeda

Koji Tasaka

Minori Tamagawa

Satomi Kawabe

Hiroshi Ide

Koichi Saito

Hideaki Mochizuki

Kazuto Kiyohara

Tetsuya Taniguchi

Yutaka Adachi

A polarizing plate protective film forming a polarizing plate by sandwiching a polarizer with two of the polarizing plate protective films, wherein at least one of the two polarizing plate protective films exhibits Ro defined by Expression (I) of 0 to 10 mm and Rt defined by Expression (II) of &#x2212;20 to 20 mm, and also at least one of the polarizing plate protective films has a hard coat layer: Expression (I): Ro=(nx&#x2212;ny)&#xd7;d; Expression (II): Rt={(nx+ny)/2&#x2212;nz}&#xd7;d; wherein nx is a refractive index in a delayed phase axis direction in a plane of the polarizing plate protective film, ny is a refractive index in a direction at right angles to the delayed phase axis in the plane, nz is a refractive index in a film thickness direction, and d is a film thickness (nm).

Polarizing plate protective film, polarizing plate, and liquid crystal display

A cellulose ester film containing a polyester represented by Formula (1) or (2), wherein an in-plane retardation value (Ro) is 0 to 5 nm and a retardation value in a thickness direction (Rt) is &#x2212;20 to 10 nm, Ro and Rt being measured at 23&#xb0; C. and 55% RH:B-(G-A-)G-B&#x2003;&#x2003;Formula (1)

Cellulose ester film, polarizing plate for in-plane-switching mode display and in-plane-switching mode display using the cellulose ester film

Disclosed is a method for producing a cellulose ester film wherein a film-forming material containing the following components A-C is heated and melted, and a cellulose ester film is formed therefrom by melt-casting. A: a cellulose resin, B: an ester compound obtained by condensing an organic acid represented by Formula (1) and a polyalcohol, and C: an aliphatic polyester or an aliphatic-aromatic copolymer. 

Method of producing cellulose ester film, cellulose ester film, polarizing plate and liquid crystal display

Disclosed is a polarizing plate protective film having high dimensional stability against moisture. Also disclosed are a polarizing plate using such a polarizing plate protective film, and a liquid crystal display. Specifically disclosed is a polarizing plate protective film which is characterized by containing a cellulose ester and a polymer X which is obtained by copolymerizing at least a styrene derivative monomer Xa having no hydroxyl group and an ethylenically unsaturated monomer Xb having a hydroxyl group or a carboxyl group, and has a weight average molecular weight of 500-100,000.

A polarizer protective film comprising: a cellulose ester; a saccharide ester having an ester of compound (A), the compound (A) having one furanose structure or one pyranose structure in the molecule, wherein all or a part of OH groups in the compound (A) are esterified, or an ester of compound (B), the compound (B) having two to twelve of at least one of a furanose structure and a pyranose structure bonded in the molecule, wherein all or a part of OH groups in the compound (B) are esterified; and a compound represented by Formula (R) or (Ra): 

Polarizer protective film, manufacturing method thereof, polarizing plate and liquid crystal display

An object is to provide an optical film in which retardation variation is less even after a long period of duration of use, to provide an optical compensating film in which transparency and flatness are not deteriorated in a stretching process by using the foregoing film as a support, and to provide a polarizing plate and a liquid crystal display exhibiting reduced visibility variation caused by heat generation of an optical LED backlight, and excellent color reproducibility. Disclosed is a manufacturing method of an optical film formed by melt-casting a composition containing a cellulose resin and a plasticizer, wherein the cellulose resin has a residual sulfuric acid content of 0.1-50 ppm, and the composition contains a polymer having a weight average molecular weight of 500-30000 prepared via polymerization of ethylenic unsaturated monomers, or an acrylic polymer having a weight average molecular weight of 500-30000.

Optical film, manufacturing method of optical film, optical compensating film, manufacturing method of optical compensating film, polarizing plate, and liquid crystal display

A stretched cellulose ester film produced by stretching after film forming employing a cellulose ester including a polyester polyol obtained from (a) a glycol having an average carbon atom number of 2 to 3.5 and (b) a dibasic or an anhydrous dibasic acid having an average carbon number of 4 to 5.5, wherein the stretched cellulose ester film exhibits retardation value Ro in the range of 30 to 200 nm, and a retardation value Rt in the range of 70 to 400 nm, Ro and Rt are each defined by specific Formulas (1) and (2).

Stretched cellulose ester film, polarizing plate and liquid crystal display employing the same

An object of the present invention is to provide a polarizing plate protective film exhibiting a reduced variation value retardation, which is highly stable against polarizing plate degradation, polarizing plate dimension, and polarizing plate curl. Disclosed is a cellulose ester film possessing cellulose ester, polymer X having a weight average molecular weight of 2000-30000 prepared by copolymerizing ethylenic unsaturated monomer Xa containing no aromatic ring and hydrophilic group within a molecule and ethylenic unsaturated monomer Xb containing no aromatic ring but a hydrophilic group within a molecule, and polymer Y having a weight average molecular weight of 500-3000 prepared by polymerizing ethylenic unsaturated monomer Ya containing no aromatic ring.

Cellulose ester film, polarizing plate and liquid crystal display

A polarizing plate includes two transparent supports A and B; and a polarizer sandwiched between the two transparent supports A and B; wherein (i) the transparent support A is a stretched cellulose ester film (a) which contains a non-phosphoric acid ester plasticizer and substantially does not contain a phosphoric acid ester plasticizer, and wherein (ii) the transparent support B is a stretched cellulose ester film (b) which has a retardation value Rof from 0 nm to 10 nm and a retardation value Rof from &#x2212;30 nm to 20 nm, and the retardation value Rand the retardation value Rare defined by the following formulas (I) and (II):=()&#xd7;&#x2003;&#x2003;Formula (I):={()/2&#x2212;&#x2003;&#x2003;Formula (II):

Polarizing plate and liquid crystal display apparatus using the same

Disclosed is a cellulose ester film comprising a polymer prepared by polymerizing at least one ethylenically unsaturated monomer selected from vinyl esters, vinyl esters having a functional group, acrylic esters, and acrylic esters having a functional group, wherein the polymer has a weight average molecular weight of not more than 5,000.

Cellulose ester film, cellulose ester dope, protective film of polarizing plate and polarizing plate

A retardation film containing a polyalcohol ester, a polycarboxylic acid ester, and a cellulose ester, wherein a total acylation degree of the cellulose ester is in the range of 2.4-2.8; and a Mw/Mn value of the cellulose ester is in the range of 1.4-3.0, provided that Mw represents a weight average molecular weight and Mn represent a number average molecular weight of the cellulose ester.

Retardation film, and polarizing plate and display device using the same

A protective film of a polarizing plate comprising a cellulose ester film, wherein a variation in a weight of the cellulose ester film is 0 to 2% under a keeping condition of 80&#xb1;5&#xb0; C. and 90&#xb1;10% RH for 48 hours.

Protective film of a polarizing plate

A film employed in a liquid crystal display member is disclosed. The film has film thickness of 20 to 60 &#x3bc;m and variation in the film thickness within &#xb1;3.0 percent of the standard film thickness.

Growing community of inventors

Otsuki, Japan

Kunio Shimizu