| abstract |
The present invention is directed to an apparatus and method for forming fibers. One embodiment of the apparatus comprises a die assembly having a plurality of nozzles, one or more defibrillation media passages, and a cover plate. The cover plate has a cover plate opening into which one or more of the nozzles can extend. The delicate medium passage has a minimum cross-sectional area, and the cover plate opening has a limited cross-sectional area, such that the minimum cross-sectional area of the fine medium passage is larger than the limited cross-sectional area of the cover plate opening. The method of the present invention also provides a die that provides a small internal pressure drop, cools the finer medium exiting the die, and / or provides a finer medium having a high relative solvent vapor content to the finer region. Can be provided. |