Fibrous structures containing particulate and including microfiber web
AssigneeHoechst Celanese Corporation
InventorsH. Gunter Groeger, George A. Serad, Clinton D. Felton
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Abstract
A fibrous structure comprising a composite fiber matrix loaded with immobilized functional particulate and including void spaces forming tortuous flow paths, is provided. The particulate is beneficially distributed in the interior of the fibrous structure in three dimensions and fused to a low melting component of the composite fibers without substantially reducing the available surface area of the particulate. A filtration structure of a composite staple having a nylon sheath and a polyester core, with activated carbon particles bonded to the fiber matrix, and including a microfiber web located within the structure, is specifically disclosed.
Claims16
A fibrous structure comprising a microfiber web disposed within said fibrous structure, and a non-woven macrofiber matrix formed from composite fiber and with functional particulate entrapped in and fusion bonded to said macrofiber matrix.
A fibrous structure comprising a thermally bonded, macrofiber matrix formed from composite fiber comprising a structural component and a lower melting component, said matrix being generally uniform in structure and said matrix comprising at least 50 wt. % of functional particulate, which is generally uniformly distributed and spaced in three dimensions in said matrix to form tortuous flow paths, said functional particulate being entrapped in interstices of said matrix and being fusion bonded to said matrix;
- and further comprising a microfiber web.
Dependencies are inferred from the claim text.