US 11,746,197 B2
Bio-based EVA compositions and articles and methods thereof
Giancarlos Delevati, São Paulo (BR); Omar Wandir Renck, São Paulo (BR); Carlos Augusto Maia Faria, São Paulo (BR); Paulo Lourenço Brito Herrmann, São Paulo (BR); Marcial Cesar Vieira, São Paulo (BR); Patricia Mara De Freitas Rocha, São Paulo (BR); Marcelo Fioravanti das Neves, São Paulo (BR); and Roger Ribeiro Malmegrim, São Paulo (BR)
Assigned to Braskem S.A., Camaçari (BR)
Filed by Braskem S.A., Camaçari (BR)
Filed on Oct. 15, 2020, as Appl. No. 17/71,826.
Claims priority of provisional application 62/915,464, filed on Oct. 15, 2019.
Prior Publication US 2021/0108039 A1, Apr. 15, 2021
Int. Cl. B32B 27/30 (2006.01); C08J 5/18 (2006.01); B29C 48/00 (2019.01); B29C 48/08 (2019.01); B32B 27/08 (2006.01); B32B 27/32 (2006.01); C08F 210/02 (2006.01); C08L 23/06 (2006.01); C08L 23/08 (2006.01); B29K 23/00 (2006.01); B29L 7/00 (2006.01)
CPC C08J 5/18 (2013.01) [B29C 48/022 (2019.02); B29C 48/08 (2019.02); B32B 27/08 (2013.01); B32B 27/306 (2013.01); B32B 27/32 (2013.01); C08F 210/02 (2013.01); C08L 23/06 (2013.01); C08L 23/0853 (2013.01); B29K 2023/083 (2013.01); B29L 2007/008 (2013.01); B32B 2250/05 (2013.01); B32B 2270/00 (2013.01); C08J 2323/06 (2013.01); C08J 2323/08 (2013.01); C08J 2423/06 (2013.01); C08J 2423/08 (2013.01); C08L 2205/025 (2013.01); C08L 2205/035 (2013.01); C08L 2207/062 (2013.01); C08L 2207/066 (2013.01)] 20 Claims
 
1. A multilayer film comprising at least one layer comprising a copolymer of ethylene and vinyl acetate and at least one layer comprising at least one other polymer, the multilayer film having a thickness ranging from 20 to 120 μm, in which the ethylene is at least partially obtained from a renewable source of carbon, the vinyl acetate is present in an amount ranging from 7 to 20 wt % of the copolymer, and wherein the copolymer has a melt index (190° C./2.16 kg) ranging from 0.12 to 8.0 g/10 min according to ASTM D1238,
wherein at least one layer of the multilayer film comprises a blend of the copolymer of ethylene at least partially obtained from the renewable source of carbon and vinyl acetate, linear low density polyethylene (LLDPE), and low density polyethylene (LDPE).