Systems and methods for making fiber webs
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United States of America Patent
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Jun 23, 2015
Grant Date -
Aug 28, 2014
app pub date -
May 7, 2014
filing date -
Jul 27, 2011
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Abstract
Systems and methods for forming fiber webs, including those suitable for use as filter media and battery separators, are provided. In some embodiments, the systems and methods involve designs which allow improved control of the fiber web forming process. For example, in certain embodiments involving the flowing of more than one fiber mixtures, the amount of mixing of the fiber mixtures may be controlled to produce fiber webs having different structural and/or performance characteristics. In some embodiments, the systems and methods can be used to form fiber webs having a gradient in a property across a portion of, or the entire, thickness of the fiber web.
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