US 12,325,569 B2
Water-soluble film and package
Minoru Okamoto, Okayama (JP); Sayaka Shimizu, Okayama (JP); and Osamu Kazeto, Okayama (JP)
Assigned to KURARAY CO., LTD., Okayama (JP)
Filed by KURARAY CO., LTD., Okayama (JP)
Filed on Jan. 13, 2022, as Appl. No. 17/574,792.
Application 17/574,792 is a continuation of application No. PCT/JP2020/027450, filed on Jul. 15, 2020.
Claims priority of application No. 2019-131681 (JP), filed on Jul. 17, 2019.
Prior Publication US 2022/0135301 A1, May 5, 2022
Int. Cl. B65D 65/46 (2006.01); B29C 41/00 (2006.01); B29C 41/46 (2006.01); B29K 31/00 (2006.01); B29L 7/00 (2006.01); C08J 5/18 (2006.01)
CPC B65D 65/46 (2013.01) [B29C 41/003 (2013.01); B29C 41/46 (2013.01); C08J 5/18 (2013.01); B29K 2031/04 (2013.01); B29K 2995/0062 (2013.01); B29L 2007/008 (2013.01); C08J 2329/04 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A water-soluble film containing polyvinyl alcohol resin, wherein a ratio RSm (LD/TD) is 1.2 or greater and 2.5 or less, where the RSm (LD/TD) is the ratio of an average length RSm (LD) of roughness curve elements on at least one film surface in a longitudinal direction to an average length RSm (TD) of roughness curve elements on the same film surface in a transverse direction.