polymer materials into apparatus 100 in addition input ports 144 146 are provided for process air liquid input ports 140 142 communicate with respective pairs of abutting and aligned recesses 148 150 and 152 154 which form coat hangar passages and communicate directly with elongate slots not shown in the top of extrusion die 104 input ports 144 146 communicate with respective pairs of abutting recesses 156 158 and 160 162 in plates 106 a 106 b and 108 a 108 b these recess 156 158 and 160 162 also form coat hanger air passages which communicate with respective elongate slots 164 166 in plates 106 c 108 c through respective transfer passages 168 170 and 172 174 in plates 106 b 106 c and 108 b 108 c to provide process or attenuating air to die 104 passages 120 122 are likewise formed as coat hangar passages formed by abutting recesses 176 178 and 180 182 having narrower portions adjacent input ports 116 and 118 and wider portions adjacent respective transfer passages 124 and 128 electric heaters 184 186 are provided as in the first embodiment fig6 illustrates another alternative die apparatus 200 having a laminated plate construction this apparatus 200 is similar to that described above with respect to the first embodiment fig1 1 a 2 3 but is configured to discharge single component filaments.