Optical film and tis producing method and polaroid lens

A manufacturing method and optical film technology, applied in the field of polarized lenses, can solve the problems of increased birefringence and optical axis deviation, light leakage, and difficulty in preventing light leakage, etc.
CN1408527AInactive Publication Date: 2003-04-09SEKISUI CHEM CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SEKISUI CHEM CO LTD
Publication Date
2003-04-09
Estimated Expiration
Not applicable · inactive patent

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Abstract

An optical film made via melt extrusion of a noncrystalline thermoplastic resin and having a thickness of below 100 mum, a residual phase difference of up to 10 nm and an optical axis deviation within +-10 DEG , and a method for manufacture of an optical film wherein, when a nocrystalline thermoplastic resin having a glass transition temperature Tg is extruded from an extrusion die into a film and bringing the film into close contact with a chill roll, a temperature of the film before the film from the die exit is brought into close contact with the chill roll is maintained not to fall below Tg+50 DEG C.
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Description

technical field

[0001] The present invention relates to the light film that can be used in optics, display and other purposes and its manufacture method and polarized lens, more particularly relate to the light film with low light strain that melt extrusion (melt extrusion) is made and its manufacture method and use The light film is polarized lenses. Background technique

[0002] In recent years there has been an increasing demand for optical films with high transparency and low residual retardation in the optical field and in displays. However, when such an optical film is produced by the melt extrusion method, strain due to stress is generated in the film due to film deformation during film formation, and remains in the film as optical strain.

[0003] This optical strain remains in the film as a phase difference. As a result, the use of such films as optical disk substrates and liquid crystal displays has caused serious problems.

[0004] as a way to reduce light stra...

Claims

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