	US 11,738,547 B2
	Gas permeable film and multilayer article for packaging
Edgard Chow, Houston, TX (US); Emilio Morales, Houston, TX (US); and Wataru Hirose, Houston, TX (US)
Assigned to Kuraray Co., Ltd., Okayama (JP)
Filed by Kuraray Co., Ltd., Okayama (JP)
Filed on Sep. 10, 2021, as Appl. No. 17/472,549.
Claims priority of provisional application 63/077,135, filed on Sep. 11, 2020.
Prior Publication US 2022/0081523 A1, Mar. 17, 2022
Int. Cl. B32B 27/30 (2006.01); B32B 7/12 (2006.01); B32B 27/08 (2006.01); B32B 27/32 (2006.01); B65D 65/40 (2006.01); C08J 5/18 (2006.01); C08L 29/04 (2006.01)

CPC B32B 27/306 (2013.01) [B32B 7/12 (2013.01); B32B 27/08 (2013.01); B32B 27/32 (2013.01); B65D 65/40 (2013.01); C08J 5/18 (2013.01); C08L 29/04 (2013.01); B32B 2250/05 (2013.01); B32B 2250/246 (2013.01); B32B 2250/40 (2013.01); B32B 2272/00 (2013.01); B32B 2307/7244 (2013.01); B32B 2307/732 (2013.01); B32B 2439/46 (2013.01); B32B 2439/70 (2013.01); C08J 2329/04 (2013.01); C08J 2423/06 (2013.01); C08J 2423/08 (2013.01); C08L 2203/16 (2013.01); C08L 2205/03 (2013.01)]

21 Claims

1. A gas permeable film comprising:

an ethylene-vinyl alcohol copolymer (A),

a polyolefin (B), and

an acid-modified ethylene-α-olefin copolymer (C),

wherein a mass ratio [(A)/((B)+(C))] of the ethylene-vinyl alcohol copolymer (A) to a total amount of the unmodified polyolefin (B) and the acid modified ethylene-α-olefin copolymer (C) is from 78/22 to 62/38, and

an oxygen permeability of the gas permeable film at 20° C./65% RH is 11 cc·20 μm/m²·day·atm or more, and 100 cc·20 μm/m²·day·atm or less.