Net shape moldable thermally conductive materials

A heat exchanger comprising:

• a first end plate;
• a plurality of middle plates attached to the first end plate, each middle plate made of a plurality of layers of a polymer composite formed by inkjet printing, wherein the plurality of layers of the polymer composite each comprise a polymer and a filler wherein the filler is between 50 percent and 95 percent by weight, and the thermal conductivity of each of the plurality of middle plates is at least 20 W/mK in one direction;
• and
• a second end plate attached to a plurality of fin layers opposite the first end plate;
• wherein the polymer of the polymer composite is a thermoplastic or a thermoset comprising fluorinated ethylene propylene (FEP) copolymer, ethylene trifluoroethylene (ETFE) polymer, liquid crystal polymer (LCP), polyetherether ketone, polyphenylene sulfide, polyaramide, polypropylene, epoxy, phenolic, bismaleimide, urethane, or combinations thereof and the polymer contains particles with a particle size the same as or less than the particle size of the filler such that the polymer fills space between the filler.