Heat exchange apparatus

A heat exchange apparatus for effecting heat exchange between a process fluid and a heat exchange fluid comprising:

• a housing, including a wall and end caps positioned at opposing ends of said housings,
• at least one module layer including a least one heat transfer layer having an exterior surface formed of a polymeric composition and at least one first spacer layer formed of a polymeric composition,
• at least one process fluid inlet for a process fluid and at least one process fluid outlet for said process fluid,
• at least one heat exchange fluid inlet for a heat exchange fluid and at least one heat exchange fluid outlet for said heat exchange fluid,
• said at least one module layer being sealed with a thermoplastic polymer composition to form a perimeter seal about said at least one spacer layer and said at least one heat transfer layer to form a first seal which isolates said at least one process fluid inlet and said process fluid outlet from said at least one heat exchange fluid inlet and said at least one heat exchange fluid outlet,
• at least one second spacer layer formed of a polymeric composition positioned adjacent each said at least one module layer and being insert molded to each other to form a perimeter seal comprising said wall positioned about the periphery of said at least one second spacer layer and said at least one module layer so that said process fluid and said heat exchange fluid can be passed through said apparatus to effect heat transfer between said fluids while preventing mass transfer between said fluids and
• said housing being formed of a polymeric composition and each of said spacer layers being formed of a composition having a thermal conductivity less than about ##EQU2##