Method of forming sheet member, exhaust gas treatment apparatus including the sheet member, and muffling apparatus including the sheet member
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United States of America Patent
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Nov 13, 2012
Grant Date -
May 13, 2010
app pub date -
Dec 21, 2009
filing date -
Jan 26, 2007
priority date (Note) -
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Abstract
A method of forming a sheet member includes feeding first raw slurry into a forming device, dehydrating the first raw slurry to form a first forming body, feeding second raw slurry including inorganic fibers having a minimum diameter substantially equal to or less than 3 micrometers on the dehydrated first slurry, dehydrating the second raw slurry to form a second forming body on the first forming body, feeding third raw slurry into the forming device, dehydrating the third raw slurry to form a third forming body on the first and the second forming bodies, and compressing and dehydrating a forming body having a three-layer structure where the third forming body is formed on the first and the second forming bodies to form a sheet member having a three-layer structure. The first and third raw slurries include inorganic fibers having a minimum diameter substantially greater than 3 micrometers.
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