A die for co-extruding at least a first extrudable polymeric composition and a second extrudable polymeric composition, the die comprising: a first die cavity in a first die portion; a second die cavity in a second die portion; and a distribution plate interposed between at least a portion of the first die cavity and at least a portion of the second die cavity, the distribution plate having a first side forming a boundary of the first die cavity, an opposing second side forming a boundary of the second die cavity, a dispensing edge, a plurality of first extrusion channels, and a plurality of second extrusion channels, with the plurality of first extrusion channels extending from entrance openings at the first die cavity to exit openings on the dispensing edge, the plurality of second extrusion channels extending from entrance openings at the second die cavity to exit openings on the dispensing edge, with the exit openings of the plurality of first extrusion channels and the exit openings of the plurality of second extrusion channels being disposed in alternating positions along the dispensing edge, wherein each of the first extrusion channels comprises two opposite side walls (54, 56) and a joining surface connecting the two opposite side walls (54, 56), wherein the joining surface of at least some of the first extrusion channels is substantially parallel to the first side of the distribution plate, characterized in that each of the first extrusion channels further comprises a rear wall opposite the exit opening and connecting the two opposite side walls (54, 56), the rear wall being substantially perpendicular to the first side of the distribution plate. a first die cavity in a first die portion; a second die cavity in a second die portion; and a distribution plate interposed between at least a portion of the first die cavity and at least a portion of the second die cavity, the distribution plate having a first side forming a boundary of the first die cavity, an opposing second side forming a boundary of the second die cavity, a dispensing edge, a plurality of first extrusion channels, and a plurality of second extrusion channels, with the plurality of first extrusion channels extending from entrance openings at the first die cavity to exit openings on the dispensing edge, the plurality of second extrusion channels extending from entrance openings at the second die cavity to exit openings on the dispensing edge, with the exit openings of the plurality of first extrusion channels and the exit openings of the plurality of second extrusion channels being disposed in alternating positions along the dispensing edge, wherein each of the first extrusion channels comprises two opposite side walls (54, 56) and a joining surface connecting the two opposite side walls (54, 56), wherein the joining surface of at least some of the first extrusion channels is substantially parallel to the first side of the distribution plate, characterized in that each of the first extrusion channels further comprises a rear wall opposite the exit opening and connecting the two opposite side walls (54, 56), the rear wall being substantially perpendicular to the first side of the distribution plate.