The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 15, 2014
Filed:
Nov. 29, 2011
Shusaku Goto, Ibaraki, JP;
Hiroaki Sawada, Ibaraki, JP;
Takeharu Kitagawa, Ibaraki, JP;
Minoru Miyatake, Ibaraki, JP;
Shusaku Goto, Ibaraki, JP;
Hiroaki Sawada, Ibaraki, JP;
Takeharu Kitagawa, Ibaraki, JP;
Minoru Miyatake, Ibaraki, JP;
Nitto Denko Corporation, Ibaraki-shi, JP;
Abstract
The present invention provides a method of producing a polarizing film having excellent optical characteristics. The method of producing a polarizing film of the present invention includes: forming a polyvinyl alcohol-based resin layeron a thermoplastic resin substrateto produce a laminate; dyeing the polyvinyl alcohol-based resin layerof the laminatewith iodine; stretching the laminate; and covering, after the dyeing and the stretching, a surface of the polyvinyl alcohol-based resin layerof the laminatewith a cover film having a moisture permeability of 100 g/m·24 h or less, followed by heating of the laminateunder the state.