US 12,259,083 B2
Multilayer tube for automotive applications
Takahiro Endo, Ibaraki (JP); Tao Nie, Rochester Hills, MI (US); Yingping Zhang, Oakland, MI (US); and He Wenbao, Suzhou (CN)
Assigned to Cooper-Standard Automotive Inc., Northville, MI (US)
Filed by Cooper-Standard Automotive, Inc., Auburn Hills, MI (US)
Filed on Apr. 6, 2022, as Appl. No. 17/714,922.
Prior Publication US 2023/0304610 A1, Sep. 28, 2023
Int. Cl. F16L 9/12 (2006.01); B32B 1/08 (2006.01); B32B 7/12 (2006.01); B32B 27/34 (2006.01)
CPC F16L 9/121 (2013.01) [B32B 1/08 (2013.01); B32B 7/12 (2013.01); B32B 27/34 (2013.01); B32B 2250/03 (2013.01); B32B 2250/24 (2013.01); B32B 2307/308 (2013.01); B32B 2597/00 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A multilayer tube comprising
an outer layer comprising an aliphatic polyamide;
a middle layer of aliphatic polyamide comprising from 20-90% of a combined thickness of three layers within said multilayer tube wherein the middle layer is a polyamide polymer selected from PA6, PA610 and PA612; and
an inner layer comprising an aliphatic polyamide and wherein a layer of adhesive is located between said inner layer and said middle layer.