US 12,109,786 B2
Multilayer structure based on recycled polyamide
Thibaut Montanari, Serquigny (FR); Bertrand Verbauwhede, Serquigny (FR); Thierry Vasselin, Tokyo (JP); and Pierre Nidercorn, Grindorff-Bizing (FR)
Assigned to ARKEMA FRANCE, Colombes (FR)
Appl. No. 17/999,127
Filed by ARKEMA FRANCE, Colombes (FR)
PCT Filed May 18, 2021, PCT No. PCT/FR2021/050856
§ 371(c)(1), (2) Date Nov. 17, 2022,
PCT Pub. No. WO2021/234263, PCT Pub. Date Nov. 25, 2021.
Claims priority of application No. 2005006 (FR), filed on May 19, 2020.
Prior Publication US 2023/0191756 A1, Jun. 22, 2023
Int. Cl. B32B 27/08 (2006.01); B32B 1/08 (2006.01); B32B 27/18 (2006.01); B32B 27/34 (2006.01)
CPC B32B 27/08 (2013.01) [B32B 1/08 (2013.01); B32B 27/18 (2013.01); B32B 27/34 (2013.01); B32B 2250/03 (2013.01); B32B 2250/24 (2013.01); B32B 2272/00 (2013.01); B32B 2307/704 (2013.01); B32B 2307/7265 (2013.01); B32B 2597/00 (2013.01); B32B 2605/08 (2013.01)] 20 Claims
 
1. A multilayer tubular structure for transporting fluids for a motor vehicle, the structure comprising at least three layers:
at least one layer (1) consisting of a composition comprising at least 50% by weight of at least one semi-crystalline aliphatic polyamide, said composition consisting of at least 50% of recycled material from a single layer and/or multilayer tube that initially transported fluids for a motor vehicle, wherein a sum of constituents of the composition is equal to 100%, said tube consisting of a composition that comprises at least 50% by weight of at least one polyamide,
at least one layer (2) consisting of a composition comprising at least 50% by weight of at least one semi-crystalline aliphatic polyamide and optionally at least one impact modifier,
and when the layer (2) consists of a composition comprising at least 50% by weight of at least one semi-crystalline aliphatic polyamide that is PA12 and/or PA612 and/or PA1010, then said composition comprises said impact modifier, and
at least one barrier layer,
said layer (2) and the barrier layer each consisting of at least 90% of non-recycled material.