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:
Jul. 09, 2024
Filed:
Mar. 28, 2019
Sekisui Chemical Co., Ltd., Osaka, JP;
SEKISUI CHEMICAL CO., LTD., Osaka, JP;
Abstract
The present invention relates to a polyvinyl alcohol film comprising a vinyl alcohol-based polymer, wherein, when the polyvinyl alcohol film is measured by a solid echo method using pulse NMR at 60° C. for waveform separation of a free induction decay curve of 1H spin-spin relaxation into three curves derived from three components a component A, a component B, and a component C in order of short relaxation time, the component B has a resulting relaxation time of 0.03 milliseconds or more and 0.05 milliseconds or less, and a resulting component ratio of 30% or more and 50% or less. From the polyvinyl alcohol film according to the present invention, a polarizing film having good polarization performance can be manufactured without the occurrence of unevenness of dyeing.