US 12,319,798 B2
Water-soluble film and packaging
Minoru Okamoto, Okayama (JP); Sayaka Shimizu, Okayama (DE); and Osamu Kazeto, Okayama (JP)
Assigned to KURARAY CO., LTD., Okayama (JP)
Filed by KURARAY CO., LTD., Okayama (JP)
Filed on Oct. 20, 2021, as Appl. No. 17/505,981.
Application 17/505,981 is a continuation of application No. PCT/JP2020/017286, filed on Apr. 22, 2020.
Claims priority of application No. 2019-082218 (JP), filed on Apr. 23, 2019.
Prior Publication US 2022/0041824 A1, Feb. 10, 2022
Int. Cl. C08J 5/18 (2006.01); B65D 65/46 (2006.01); C08F 16/06 (2006.01); C08K 5/05 (2006.01); C08K 5/42 (2006.01); C08K 5/521 (2006.01); C11D 17/04 (2006.01)
CPC C08J 5/18 (2013.01) [B65D 65/46 (2013.01); C08F 16/06 (2013.01); C08K 5/05 (2013.01); C08K 5/42 (2013.01); C08K 5/521 (2013.01); C11D 17/043 (2013.01); C08J 2329/04 (2013.01)] 20 Claims
 
18. A packaging body comprising:
a water-soluble film including polyvinyl alcohol resin,
wherein the packaging body is configured to store a chemical,
wherein the ratio of fluorine element to the total amount of elements (F1S) found at the time of analyzing a first surface of the water-soluble film through X-ray Photoelectron Spectroscopy is 1 mol % or greater and 25 mol % or less,
wherein the ratio of the fluorine element to the total amount of elements (F1B) found at the time of analyzing a surface 0.1 μm deep from the first surface through X-ray Photoelectron Spectroscopy is 0.5 mol % or less,
wherein the ratio of fluorine element to the total amount of elements (F2S) found at the time of analyzing a second surface opposite the first surface of the water-soluble film through X-ray Photoelectron Spectroscopy is 1 mol % or greater and 25 mol % or less; and the ratio of fluorine element to the total amount of elements (F2B) found at the time of analyzing a surface 0.1 μm deep from the second surface through X-ray Photoelectron Spectroscopy is 0.5 mol % or less, and
wherein a difference between the F1S and the F2S is 2.5 mol % or greater.