Method and apparatus for strengthening a porous substrate
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United States of America Patent
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Oct 18, 2011
Grant Date -
Jun 21, 2007
app pub date -
Dec 21, 2006
filing date -
Dec 21, 2005
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Abstract
A process is provided for strengthening a porous substrate. The process includes providing a substrate having intersecting fibers, where the intersecting fibers cooperate in the final substrate product to form an open pore network. Pathways are opened into the fibrous substrate structure, which enable a flow of gas into the or through the substrate. The substrate is positioned in a CVD (chemical vapor deposition) station, and one or more layers of a strengthening agent is deposited. The deposited layer or layers form a strong coating around fibers and fiber intersections to provide additional strength to the substrate. The strengthened substrate may then be used in wide variety of applications and fields. Advantageously, the disclosed fiber strengthening process produces a substrate having high porosity and higher strength characteristics as compared to a non-strengthened substrate.
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