Melt-blown material with depth fiber size gradient
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United States of America Patent
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-
Dec 22, 1987
Grant Date -
N/A
app pub date -
May 2, 1986
filing date -
May 2, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A filter medium is formed by sequentially depositing layers of melt-blown thermoplastic fibers, having the same composition but different sizes, onto a collector. The resulting laminate web has a fiber size gradient across its depth so that the large particulate can be trapped across the filter's depth without prematurely plugging the fine fiber, high efficiency layers.
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Cited Art Landscape
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