Flexible heat exchanger

Details Flexible heat exchanger Flexible heat exchanger

2007-07-17

2007-07-17

Ciric, Ljiljana (Department: 3744)

Heat exchange

With vehicle feature

C165S046000, C165S168000, C165S905000, C029S890039, C244S158100

Reexamination Certificate

active

10628240

ABSTRACT:
The invention generally relates to a flexible heal exchanger comprising a pair of flexible multilayer thermoplastic polyimide films each of which comprises an aromatic polyimide substrate film showing no glass transition temperature or a glass transition temperature of 340° C. or higher and a thermoplastic aromatic polyimide surface film showing a glass transition temperature in the range of 190 to 300° C. in which the surface films of the flexible multilayer thermoplastic polyimide films face each other and are in part fused together, whereby producing between the flexible multilayer thermoplastic polyimide films a conduit pattern through which a fluid passes. The flexible multilayer thermoplastic polyimide films preferably have a thickness in the range of 10 to 125 μm and comprise a linear expansion coefficient of MD, a linear expansion coefficient of TD and an average of linear expansion coefficients of MD and TD, in the range of 10×10−6to 35×10−6cm/cm/° C. at 50-200° C.

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