Back to results
US 12,259,083 B2Granted
Multilayer tube for automotive applications
AssigneeCooper-Standard Automotive Inc.
InventorsTakahiro Endo, Tao Nie, Yingping Zhang, He Wenbao
Life of this patent
Estimating the term…
Abstract
A multilayer tube is provided for use in with transmission oil or heating and cooling fluid applications in motor vehicles. The multilayer tube has an outer layer comprising an aliphatic or an aromatic polyamide to provide protection from the outside environment; a middle layer of a lower cost material that comprises from 20-90% of the thickness of the tube materials; and an inner layer that has excellent resistance to transmission oil or glycol coolant and temperature.
Claims8
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.
1 more element
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 and an inner layer comprising a polyamide polymer selected from PA610, PA612, PA1010, and PA1012 and wherein a layer of adhesive is located between said inner layer and said middle layer.
A multilayer tube comprising
- an outer layer comprising an aliphatic polyamide;
- a middle layer of PA6 wherein said middle layer comprises from 20-90% of a combined thickness of three layers within said multilayer tube and
- an inner layer comprising PA610 and wherein a layer of adhesive is located between said inner layer and said middle layer.
Dependencies are inferred from the claim text.