Lg Chem, Ltd

Lg Energy Solution, Ltd.

Sang-Min Kwak

Nam-Jeong Lee

Jun-Geun Um

Suk-Il Youn

Chang-Hun Han

Byoung-Il Kang

Dae-Woo Lee

Min-Hee Lee

Jae-Bum Seo

Eun-Jung Choi

Jeong-Min Choi

Kyung-Sik Kim

Jung-Tae Park

Joon-Sik Kim

Joong-Hoon Lee

Kyung-Jae Kwon

Joo-Sung Lee

Jun-Wuk Park

Won-Sik Bae

Sei-Jung Park

Beom-Suk Kim

Yoo-Seong Hong

A system for detecting a defective porous sheet includes a jig having a through-hole, a heating unit, a temperature sensor, a controlling unit, an air permeability-determining unit and a judging unit. In this manner, it is possible to provide a novel system for detecting a porous sheet, which may be a defective separator after being coated with a porous coating layer, beforehand by using the air permeability and shut-down temperature of the porous sheet itself.

Defective porous sheet detection system and detection method

The present disclosure relates to a multilayer optical film including a first film layer formed of a thermoplastic acrylic resin composition including 0.01 to 2.0 parts by weight of a triazine-based ultraviolet absorber; a second film layer formed of a thermoplastic acrylic resin composition including 0.1 to 5.0 parts by weight of at least one ultraviolet absorber selected from a group consisting of a triazole-based ultraviolet absorber, a benzophenone-based ultraviolet absorber, an oxanilide-based ultraviolet absorber and a cyanoacrylate-based ultraviolet absorber; and a third film layer formed of the thermoplastic acrylic resin composition including 0.01 to 2.0 parts by weight of the triazine-based ultraviolet absorber, with respect to 100 parts by weight of the thermoplastic acrylic resin composition, a method of manufacturing the same, and a polarizing plate including the same.

Multilayer optical film, method of producing the same and polarizer comprising the same

There is provided an optical film including an ultraviolet light absorbent having a first peak with a maximum absorption coefficient of 0.07 to 0.10 phr&#x3bc;min a wavelength band of 290 to 320 nm and a second peak with a maximum absorption coefficient of 0.11 to 0.16 phr&#x3bc;min a wavelength band of 330 to 400 nm, an acrylic resin, and a hindered amine light stabilizer (HALS), and a polarizing plate including the same.

Optical film exhibiting excellent blocking properties for ultraviolet light and polarizing plate including the same

There is provided an optical film including an ultraviolet light absorbent having a first peak with a maximum absorption coefficient of 0.07 to 0.10 phr&#x3bc;min a wavelength band of 290 to 320 nm and a second peak with a maximum absorption coefficient of 0.11 to 0.16 phr&#x3bc;min a wavelength band of 330 to 400 nm, and acrylic resin, wherein the content of the ultraviolet light absorbent is 0.3 to 1.0 parts by weight with respect to 100 parts by weight of the acrylic resin, and a polarizing plate including the same.

Provided is a method of preparing a resin composition for an optical film. The method includes forming a four-component copolymer by reacting an alkyl(meth)acrylate-based monomer, an acrylate-based monomer containing a benzene ring, and a (meth)acrylic acid monomer by using a continuous bulk polymerization method; and forming a resin composition for an optical film by removing unreacted monomer and solvent from a reaction product in a devolatilizer.

Method of preparing resin composition for optical film by using continuous bulk polymerization and methods of preparing optical film and polarizing plate using the resin composition

Provided are a composition for an optical film comprising 40 wt % to 94 wt % of an acrylic resin; 5 wt % to 40 wt % of a styrene-acrylonitrile copolymer having a weight-average molecular weight less than 1,000,000; and 1 wt % to 20 wt % of an ultra-high molecular weight styrene-acrylonitrile copolymer having a weight-average molecular weight ranging from 1,000,000 to 9,000,000, and an optical film using the composition.

Resin composition for optical film and compensation film using the same

Provided are a resin composition and an optical film formed by using the same, and more particularly, a resin composition including 85 to 95 parts by weight of a matrix copolymer resin including an alkyl(meth)acrylate-based unit, an acryl-based unit containing a benzene ring, and a (meth)acrylic acid unit, and 5 to 15 parts by weight of a polymer resin having a molecular weight range of 150,000 to 1,000,000 and an optical film formed by using the composition. A resin composition according to the present invention may provide a protective film for a polarizing plate having excellent heat resistance and toughness as well as excellent optical properties, and thus, an optical film formed by using the resin composition of the present invention may be used in information electronic devices such as display devices for various applications.

Resin composition and optical film formed by using the same

The present invention provides a retardation film that comprises a) a first acrylic resin layer; and b) a second acrylic resin layer that is layered on at least one side of a) the first acrylic resin layer and comprises an acrylic resin and 1 to 20 parts by weight of rubber component based on 100 parts by weight of the acrylic resin. The retardation film according to the present invention has excellent optical transparency, haze, brittleness, mechanical strength, heat resistance, durability, and the like.

Multi-layered acrylic retardation film and fabrication method thereof

Disclosed is an optical film that is manufactured by using longitudinal and uniaxial stretching of an unstretched cycloolefin copolymer film and has an in-plane retardation of 100 to 150 nm and a thickness retardation of 0 to &#x2212;30 nm at a wavelength of 550 nm, a polarizing plate and a liquid crystal display including the same, and a method of manufacturing the optical film. The method includes longitudinally and uniaxially stretching the unstretched film while a ratio of a width to a length of a stretched portion of the film is controlled.

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Daejeon, South Korea

Sang-Min Kwak