US 12,448,489 B2
Resin film
Tomoaki Hashiguchi, Settsu (JP)
Assigned to KANEKA CORPORATION, Osaka (JP)
Appl. No. 18/003,642
Filed by KANEKA CORPORATION, Osaka (JP)
PCT Filed Jun. 28, 2021, PCT No. PCT/JP2021/024311
§ 371(c)(1), (2) Date Dec. 28, 2022,
PCT Pub. No. WO2022/004637, PCT Pub. Date Jan. 6, 2022.
Claims priority of application No. 2020-111919 (JP), filed on Jun. 29, 2020.
Prior Publication US 2023/0235137 A1, Jul. 27, 2023
Int. Cl. C08J 5/18 (2006.01); C08L 67/04 (2006.01)
CPC C08J 5/18 (2013.01) [C08L 67/04 (2013.01); C08J 2367/04 (2013.01); C08J 2467/04 (2013.01); C08L 2203/16 (2013.01); C08L 2205/025 (2013.01)] 16 Claims
 
1. A resin film, comprising:
a poly(3-hydroxyalkanoate) resin component comprising a copolymer (A) which is a copolymer of 3-hydroxybutyrate units and other hydroxyalkanoate units and in which a content of the other hydroxyalkanoate units is from 1 to 6 mol %, and a copolymer (B) which is a copolymer of 3-hydroxybutyrate units and other hydroxyalkanoate units and in which a content of the other hydroxyalkanoate units is at least 24 mol %,
wherein in the poly(3-hydroxyalkanoate) resin component, a proportion of the copolymer (A) is from 35 wt % to 80 wt %, and a proportion of the copolymer (B) is from 20 wt % to 65 wt %, the other hydroxyalkanoate units in the copolymer (B) are 3-hydroxyhexanoate units,
a tensile modulus of the resin film is from 500 to 1,500 MPa, and
a swelling degree of the resin film, as measured by immersion of the resin film in methyl ethyl ketone for two hours, is from 1 to 5.