	US 12,315,969 B2
	Laminated body for fuel cell
Masahiro Kuragaki, Otsu (JP); Ai Koganemaru, Otsu (JP); Yoshitaka Tanaka, Inuyama (JP); and Shigeyuki Watanabe, Otsu (JP)
Assigned to TOYOBO CO., LTD., Osaka (JP)
Appl. No. 17/634,152
Filed by TOYOBO CO., LTD., Osaka (JP)
PCT Filed Aug. 27, 2020, PCT No. PCT/JP2020/032374 § 371(c)(1), (2) Date Feb. 9, 2022, PCT Pub. No. WO2021/044940, PCT Pub. Date Mar. 11, 2021.
Claims priority of application No. 2019-162855 (JP), filed on Sep. 6, 2019.
Prior Publication US 2022/0293971 A1, Sep. 15, 2022
Int. Cl. B32B 27/08 (2006.01); B32B 27/28 (2006.01); B32B 27/32 (2006.01); B32B 27/36 (2006.01); H01M 8/0273 (2016.01); H01M 8/0284 (2016.01)

CPC H01M 8/0284 (2013.01) [B32B 27/08 (2013.01); B32B 27/286 (2013.01); B32B 27/32 (2013.01); B32B 27/36 (2013.01); H01M 8/0273 (2013.01); B32B 2307/54 (2013.01); B32B 2307/732 (2013.01); B32B 2457/18 (2013.01)]

14 Claims

1. A laminated body for a fuel cell having an outer peripheral shape corresponding to an outer peripheral shape of a fuel battery cell, the laminated body comprising:

a resin substrate film and

a heat seal layer disposed on each of both surfaces of the resin substrate film,

wherein

the resin substrate film has a storage elastic modulus of 2,000 MPa to 8,000 MPa,

the resin substrate film has an average thickness of 30 μm to 300 μm,

a maximum value T1_maxand a minimum value T1_minof a thickness of the resin substrate film measured in a peripheral edge portion of the resin substrate film satisfy a relationship of T1_{maxl -T}1_min≤12 μm,

a maximum value T2_maxand a minimum value T2_minof an average value of thicknesses of the resin substrate film measured at every 10 adjacent points in the peripheral edge portion of the resin substrate film satisfy a relationship of T2_max-T2_min≤6 μm, and

the heat seal layer has an average thickness of 25 μm to 100 μm.