Ronald G Cox

US Patent:

7425517, Sep 16, 2008

Filed:

Jul 25, 2003

Appl. No.:

10/627558

Inventors:

Ganesh Chandra Deka - Duluth GA, US
Christopher John Lawler - Appleton WI, US
Billy Dean Arnold - Alpharetta GA, US
David Joseph Reader - Appleton WI, US
Ronald C. Cox - Smyrna GA, US

Assignee:

Kimberly-Clark Worldwide, Inc. - Neenah WI

International Classification:

D04H 1/00

US Classification:

442327, 442381, 442382, 442392

Abstract:

The present invention provides a nonwoven web or laminate having at least one surface with abrasion resistance and a low degree of free fibers on the surface. Also provided is a lofty nonwoven web laminate from multicomponent fibers having at least one surface with improved abrasion resistance and reduced fuzziness over other multicomponent fiber nonwoven webs. This nonwoven webs and laminate can be used where nonwoven webs and laminates are currently used, but are particularly suitable as a filter media. Also described is a method for producing a nonwoven web having at least one abrasion resistant surface. The process includes using a liner material between the forming surface and the forming nonwoven web, wherein the liner is removed after the nonwoven web is bonded. Removing the liner exposes the abrasion resistant surface of the nonwoven web or laminate.

US Patent:

20030203694, Oct 30, 2003

Filed:

Apr 26, 2002

Appl. No.:

10/133599

Inventors:

Ganesh Chandra Deka - Duluth GA, US
Ronald Cox - Smyrna GA, US

Assignee:

Kimberly-Clark Worldwide, Inc.

International Classification:

B32B005/26

US Classification:

442/359000, 442/381000, 442/382000, 442/400000, 442/401000, 442/403000, 442/412000, 442/416000, 264/168000

Abstract:

Disclosed is a filter medium having at least a first layer containing a stabilized matrix of thermoplastic filaments and at least one secondary material; and a second layer having a stabilized matrix of thermoplastic filaments and optionally of at least one secondary material. Each of the layer of the filter medium has a different compositional ratio of the components to result in a gradient structure. The compositional gradient for the layers of the coform results in a filter having improved capacity, which extends the life of the filter medium, as compared to a filter without the compositional gradient. The present invention also provides a method of removing particles from a fluid containing particles. The method of the present invention includes contacting the fluid containing particles with the filter medium of having the two layers described above in a manner such that the fluid containing particles is passed through the first layer of the filter medium before the second layer.