US 12,291,613 B2
Water-soluble film and package
Minoru Okamoto, Okayama (JP); Sayaka Shimizu, Okayama (JP); Osamu Kazeto, Okayama (JP); and Mitsunori Asada, Okayama (JP)
Assigned to KURARAY CO., LTD., Okayama (JP)
Filed by KURARAY CO., LTD., Okayama (JP)
Filed on Jun. 28, 2021, as Appl. No. 17/360,055.
Application 17/360,055 is a continuation of application No. PCT/JP2019/051492, filed on Dec. 27, 2019.
Claims priority of application No. 2018-248291 (JP), filed on Dec. 28, 2018.
Prior Publication US 2021/0324162 A1, Oct. 21, 2021
Int. Cl. C08J 5/18 (2006.01); B65D 65/46 (2006.01); C08K 5/053 (2006.01)
CPC C08J 5/18 (2013.01) [B65D 65/46 (2013.01); C08K 5/053 (2013.01); C08J 2329/04 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A water-soluble film comprising a polyvinyl alcohol resin, wherein
a crystallite size obtained from an X-ray profile obtained by wide-angle X-ray measurement is from 4.0 to 5.5 nm and a degree of crystallization obtained from the X-ray profile is from 10.0% to 25.0%, and
an external haze is from 7.0% to 30.0%, wherein the external haze is obtained by subtracting an internal haze from a total haze, in which the total haze is measured in accordance with ASTM D1003-61, and the internal haze is obtained by measuring haze of an adhesive-bonded water-soluble film in accordance with ASTM D1003-61.