An assembly for manufacturing a multilayer film, the assembly comprising: a first packet creator (35, 56, 156, 256, 356) configured to form a first primary packet including a first plurality of polymeric layers stacked on each other; a second packet creator (37, 58, 158, 258, 358), distinct from the first packet creator (35, 56, 156, 256, 356), configured to form a second primary packet, distinct from the first primary packet, including a second plurality of polymeric layers stacked on each other; and an extrusion die configured to receive the first primary packet and second primary packet from the packet creators separate from each other, the extrusion die comprising: a first flow channel (60a, 160a, 260a, 360a) configured to receive the first primary packet; and a second flow channel (62a, 162a, 262a, 362a) configured to receive the second primary packet, wherein the first flow channel (60a, 160a, 260a, 360a) and the second flow channel (62a, 162a, 262a, 362a) are configured to spread at least one of the first and second primary packets in a cross-web direction and, after spreading the at least one of the first and second primary packets in the cross-web direction, combine the first and second primary packets to form a multilayer flow stream (32, 42, 82, 182, 282, 383) including the first and second plurality of polymeric layers, and wherein for at least one of the first and second packet creators (35, 56, 156, 256, 356; 37, 58, 158, 258, 358), the packet creator is configured such that the number of individual polymeric layers in the primary packet formed by the packet creator is at least 20. a first packet creator (35, 56, 156, 256, 356) configured to form a first primary packet including a first plurality of polymeric layers stacked on each other; a second packet creator (37, 58, 158, 258, 358), distinct from the first packet creator (35, 56, 156, 256, 356), configured to form a second primary packet, distinct from the first primary packet, including a second plurality of polymeric layers stacked on each other; and an extrusion die configured to receive the first primary packet and second primary packet from the packet creators separate from each other, the extrusion die comprising: a first flow channel (60a, 160a, 260a, 360a) configured to receive the first primary packet; and a second flow channel (62a, 162a, 262a, 362a) configured to receive the second primary packet, wherein the first flow channel (60a, 160a, 260a, 360a) and the second flow channel (62a, 162a, 262a, 362a) are configured to spread at least one of the first and second primary packets in a cross-web direction and, after spreading the at least one of the first and second primary packets in the cross-web direction, combine the first and second primary packets to form a multilayer flow stream (32, 42, 82, 182, 282, 383) including the first and second plurality of polymeric layers, and wherein for at least one of the first and second packet creators (35, 56, 156, 256, 356; 37, 58, 158, 258, 358), the packet creator is configured such that the number of individual polymeric layers in the primary packet formed by the packet creator is at least 20. a first flow channel (60a, 160a, 260a, 360a) configured to receive the first primary packet; and a second flow channel (62a, 162a, 262a, 362a) configured to receive the second primary packet, wherein the first flow channel (60a, 160a, 260a, 360a) and the second flow channel (62a, 162a, 262a, 362a) are configured to spread at least one of the first and second primary packets in a cross-web direction and, after spreading the at least one of the first and second primary packets in the cross-web direction, combine the first and second primary packets to form a multilayer flow stream (32, 42, 82, 182, 282, 383) including the first and second plurality of polymeric layers, and wherein for at least one of the first and second packet creators (35, 56, 156, 256, 356; 37, 58, 158, 258, 358), the packet creator is configured such that the number of individual polymeric layers in the primary packet formed by the packet creator is at least 20.