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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.:

US 9272460 B1

PDFFull Text
Date of Patent:
Mar. 01, 2016

Filed:

May. 30, 2011

Method of producing polarizing film

Applicants:

Naoyuki Matsuo, Ibaraki, JP;

Mayu Shimoda, Ibaraki, JP;

Yuuki Nakano, Ibaraki, JP;

Inventors:

Naoyuki Matsuo, Ibaraki, JP;

Mayu Shimoda, Ibaraki, JP;

Yuuki Nakano, Ibaraki, JP;

Assignee:

NITTO DENKO CORPORATION, Ibaraki-shi, JP;

Attorney:

Westerman, Hattori, Daniels & Adrian, LLP

Primary Examiner:

Carson Gross

Int. Cl.
CPC ...
B29C 65/16 (2006.01); B29C 55/02 (2006.01); B29C 65/50 (2006.01); B29C 65/00 (2006.01); B65H 21/00 (2006.01); G02B 5/30 (2006.01); B29D 11/00 (2006.01); B29C 55/06 (2006.01); B29C 65/82 (2006.01); B29K 29/00 (2006.01); B32B 37/20 (2006.01); B32B 38/00 (2006.01); B29L 11/00 (2006.01);
U.S. Cl.
CPC ...
B29C 55/02 (2013.01); B29C 55/026 (2013.01); B29C 65/1635 (2013.01); B29C 65/1683 (2013.01); B29C 65/5042 (2013.01); B29C 65/8253 (2013.01); B29C 66/1122 (2013.01); B29C 66/1142 (2013.01); B29C 66/344 (2013.01); B29C 66/43 (2013.01); B29C 66/71 (2013.01); B29C 66/7338 (2013.01); B29C 66/81267 (2013.01); B29C 66/8322 (2013.01); B29D 11/00644 (2013.01); B65H 21/00 (2013.01); G02B 5/3033 (2013.01); B29C 55/06 (2013.01); B29C 65/1616 (2013.01); B29C 65/1619 (2013.01); B29C 65/1654 (2013.01); B29C 65/1667 (2013.01); B29C 65/8215 (2013.01); B29K 2029/04 (2013.01); B29K 2995/0034 (2013.01); B29L 2011/00 (2013.01); B32B 37/206 (2013.01); B32B 38/164 (2013.01); B32B 2038/0028 (2013.01); B32B 2307/42 (2013.01);
Abstract

A method of producing a polarizing film having a high polarizing function. Provided is a method of producing a polarizing film, including the steps of: at least dyeing and stretching a first polyvinyl alcohol of two or more band-like polyvinyl alcohol films in the course of a traveling path while traveling the first polyvinyl alcohol film in a longitudinal direction, and bonding a tail end of the first polyvinyl alcohol resin film to a leading end of a second polyvinyl alcohol resin film to at least dye and stretch the first and second polyvinyl alcohol resin films continuously, wherein the first and second polyvinyl alcohol resin films are arranged with the tail end of the first polyvinyl alcohol resin film and the leading end of the second polyvinyl alcohol resin film being layered, and an interface portion thereof is laser welded to perform the bonding.

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