	US 11,859,063 B2
	Poly(vinyl alcohol) film and production method for polarizing film
Yohei Nishimura, Osaka (JP); Yasunari Kusaka, Osaka (JP); and Nami Nakajima, Osaka (JP)
Assigned to SEKISUI CHEMICAL CO., LTD., Osaka (JP)
Appl. No. 16/980,481
Filed by SEKISUI CHEMICAL CO., LTD., Osaka (JP)
PCT Filed Mar. 28, 2019, PCT No. PCT/JP2019/013865 § 371(c)(1), (2) Date Sep. 14, 2020, PCT Pub. No. WO2019/189687, PCT Pub. Date Oct. 3, 2019.
Claims priority of application No. 2018-070355 (JP), filed on Mar. 30, 2018.
Prior Publication US 2021/0009772 A1, Jan. 14, 2021
Int. Cl. C08J 5/18 (2006.01); G02B 5/30 (2006.01)

CPC C08J 5/18 (2013.01) [G02B 5/3033 (2013.01); C08J 2429/04 (2013.01)]

8 Claims

1. 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 A has a resulting relaxation time of 0.0070 milliseconds or more and 0.0092 milliseconds or less, and a resulting component ratio of 20% or more and 50% or less.