| 摘要 |
A feedblock including a first packet creator that forms a first packet including a first plurality of polymeric layers, the first plurality of layers including at least four first individual polymeric layers; and a second packet creator that forms a second packet including a second plurality of polymeric layers, the second plurality of layers including at least four second individual polymeric layers, wherein the first and second packet creators are configured such that, for each packet creator, respective individual polymeric layers of the plurality of polymeric layers are formed at approximately the same time. The feedblock may include a packet combiner that receives and combines the first and second primary packets to form a multilayer stream. In some examples, at least one of the first and second primary packets may be spread in the cross-web direction prior to being combined with one another. |
| 主权项 |
1. A method for manufacturing a multilayer article, the method comprising:
forming a first packet including a first plurality of polymeric layers via a first packet creator, the first plurality of polymeric layers including at least four first individual polymeric layers; forming a second packet including a second plurality of polymeric layers via a second packet creator distinct from the first packet creator, the second plurality of polymeric layers including at least four second individual polymeric layers, wherein the first individual polymeric layers are formed at approximately the same time as one another, and the second individual polymeric layers are formed at the same time as one another; and combining the first packet and the second packet via a packet combining section of a feedblock, wherein the packet combining section comprises:
a first channel that receives the first packet from the first packet creator; anda second channel that receives the second packet from the second packet creator, wherein the first channel and the second channel are configured to combine the first and second packets to form a multilayer flow stream including the first plurality of polymeric layers and second plurality of polymeric layers, wherein the first packet creator is disposed in the feedblock and includes a first plurality of flow channels, a first plurality of conduits, a first plurality of slots, and a first compression section all in fluid communication with each other and configured to generate the first packet having the first plurality of polymeric layers, wherein the second packet creator is disposed in the feedblock and includes a second plurality of flow channels, a second plurality of conduits, a second plurality of slots, and a second compression section all in fluid communication with each other and configured to generate the second packet having the second plurality of polymeric layers, wherein for each primary packet generated in the feedblock, the feedblock includes a distinct packet creator having a distinct plurality of flow channels and a distinct plurality of conduits. |
