US 12,280,584 B2
Multilayer structure, method of producing the same, and packaging container
Akihiro Kotaka, Kurashiki (JP); Masahiko Ota, Kurashiki (JP); and Nicholas John McCaffrey, Altona (AU)
Assigned to PLANTIC TECHNOLOGIES LTD, Altona (AU)
Appl. No. 17/641,990
Filed by PLANTIC TECHNOLOGIES LTD, Altona (AU)
PCT Filed Sep. 11, 2020, PCT No. PCT/IB2020/058441
§ 371(c)(1), (2) Date Mar. 10, 2022,
PCT Pub. No. WO2021/048795, PCT Pub. Date Mar. 18, 2021.
Claims priority of application No. 2019-167518 (JP), filed on Sep. 13, 2019.
Prior Publication US 2023/0241864 A1, Aug. 3, 2023
Int. Cl. B32B 9/02 (2006.01); B32B 7/12 (2006.01); B32B 27/36 (2006.01)
CPC B32B 9/02 (2013.01) [B32B 7/12 (2013.01); B32B 27/36 (2013.01); B32B 2250/02 (2013.01); B32B 2307/7163 (2013.01); B32B 2307/7244 (2013.01); B32B 2317/20 (2013.01); B32B 2367/00 (2013.01); B32B 2439/70 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A multilayer structure comprising, in the following order:
a starch layer (A), comprising a starch and water;
an adhesive layer (B), comprising a thermoplastic resin having a density of 9.20 g/cm3 or lower and an acid value of 0.3 mgKOH/g or higher; and
a base material layer (C), having a tensile elastic modulus of 100 MPa or higher,
wherein
the adhesive layer is disposed on the base material layer and the starch layer is disposed on the adhesive layer.