Melt-blown material with depth fiber size gradient
AssigneeKimberly-Clark Corporation
InventorsPeter W. Shipp, Jr., Clifford M. Vogt
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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.
Claims8
A process for forming a composite web of melt-blown thermoplastic fibers, wherein the web has a fiber size gradient across its depth, the process comprising sequentially depositing and interbonding a number of layers of melt-blown thermoplastic fibers one on top of the other onto a collector wherein the fibers in adjacent layers are of the same fiber composition but of different fiber size.
A filter medium comprising a composite web of melt-blown thermoplastic fibers, the web having a fiber size gradient across its depth, wherein the gradient results from sequentially depositing and interbonding a number of layers of melt-blown thermoplastic fibers having the same composition but different sizes onto a collector.
Dependencies are inferred from the claim text.