Stephen R Sharp

US Patent:

7438777, Oct 21, 2008

Filed:

Apr 1, 2005

Appl. No.:

11/096954

Inventors:

Behnam Pourdeyhimi - Cary NC, US
Nataliya V. Fedorova - Kiev, UA
Stephen R. Sharp - Holly Springs NC, US

Assignee:

North Carolina State University - Raleigh NC

International Classification:

B32B 37/00

US Classification:

156148, 156167, 156181, 156296, 1563096

Abstract:

A method of producing a nonwoven fabric comprising spinning a set of bicomponent fibers which include an external fiber component and an internal fiber component. The external fiber enwraps said internal fiber and has a higher elongation to break value than the internal fiber and a lower melting temperature than the internal fiber component. The set of bicomponent fibers are positioned onto a web and thermally bonded to produce a nonwoven fabric.

US Patent:

7883772, Feb 8, 2011

Filed:

Jun 28, 2007

Appl. No.:

11/769871

Inventors:

Behnam Pourdeyhimi - Cary NC, US
Stephen Sharp - Raleigh NC, US

Assignee:

North Carolina State University - Raleigh NC

International Classification:

D02G 3/36

US Classification:

428373, 428364, 428401

Abstract:

A fabric including microdenier fibers is provided, the microdenier fibers prepared by fibrillating a multicomponent, multilobal fiber including a contiguous core fiber component enwrapped by a multilobal sheath fiber component such that the sheath fiber component forms the entire outer surface of the multicomponent fiber, wherein the core fiber component and the multilobal sheath fiber component are sized such that the multicomponent, multilobal fiber can be fibrillated to expose the core fiber component and split the fiber into multiple microdenier fibers.

US Patent:

7935645, May 3, 2011

Filed:

Sep 26, 2008

Appl. No.:

12/239028

Inventors:

Behnam Pourdeyhimi - Cary NC, US
Nataliya V. Fedorova - Kiev, UA
Stephen R. Sharp - Holly Springs NC, US

Assignee:

North Carolina State University - Raleigh NC

International Classification:

D04H 1/00
D04H 13/00
D04H 3/00
D04H 5/00

US Classification:

442361, 442 60, 442329, 442363, 442364, 442401

Abstract:

A method of producing a nonwoven fabric comprising spinning a set of bicomponent fibers which include an external fiber component and an internal fiber component. The external fiber enwraps said internal fiber and has a higher elongation to break value than the internal fiber and a lower melting temperature than the internal fiber component. The set of bicomponent fibers are positioned onto a web and thermally bonded to produce a nonwoven fabric.

US Patent:

7981226, Jul 19, 2011

Filed:

Jun 23, 2006

Appl. No.:

11/473534

Inventors:

Behnam Pourdeyhimi - Cary NC, US
Nataliya V. Fedorova - Raleigh NC, US
Stephen R. Sharp - Holly Springs NC, US

Assignee:

North Carolina State University - Raleigh NC

International Classification:

D04H 1/46
D04H 3/10

US Classification:

156 624, 156148, 156167, 26417213

Abstract:

The subject matter disclosed herein relates generally to fabrics composed of micro-denier fibers wherein said fibers are formed as bicomponent fibrillated fiber. The energy is sufficient for fibrillating as well as entangling (bonding) the fibers. These fabrics can be woven or knitted and made from made from bicomponent islands in the sea fibers and filaments or can be nonwovens and formed by either spunbonding or through the use of bicomponent staple fibers formed into a web by any one of several means and bonded similarly to those used for the spunbonded filament webs.

US Patent:

8420556, Apr 16, 2013

Filed:

Jun 24, 2011

Appl. No.:

13/168123

Inventors:

Behnam Pourdeyhimi - Cary NC, US
Nataliya V. Fedorova - Raleigh NC, US
Stephen R. Sharp - Holly Springs NC, US

Assignee:

North Carolina State University - Raleigh NC

International Classification:

D04H 3/10
D02G 3/02

US Classification:

442364, 442361, 442363, 428373, 428374

Abstract:

The subject matter disclosed herein relates generally to fabrics composed of micro-denier fibers wherein said fibers are formed as bicomponent fibrillated fiber. The energy is sufficient for fibrillating as well as entangling (bonding) the fibers. These fabrics can be woven or knitted and made from made from bicomponent islands in the sea fibers and filaments or can be nonwovens and formed by either spunbonding or through the use of bicomponent staple fibers formed into a web by any one of several means and bonded similarly to those used for the spunbonded filament webs.

US Patent:

20040214498, Oct 28, 2004

Filed:

Oct 23, 2003

Appl. No.:

10/692313

Inventors:

Steven Webb - Midland MI, US
Jared Austin - Greer SC, US
Stephen Sharp - Holly Springs NC, US
Ruediger Kesselmeier - , US

International Classification:

D04H003/00

US Classification:

442/329000, 442/361000

Abstract:

A bonded web of multi-component strands that include a first polymeric component and a second polymeric component is capable of overcoming a number of problems associated with nonwoven webs including both stickiness and blocking. The first polymeric component and second polymeric component are arranged in substantially distinct zones extending longitudinally along at least a portion of a length of the strands which make up the web with the second component containing a zone constituting at least a portion of the peripheral surface of the strand. The first polymeric component also has an elasticity which is greater than that of the second polymer component. A process producing elastomeric spunbonded nonwoven fabrics which utilizes the activation by incremental stretching of the strands is also provided.

US Patent:

20060082012, Apr 20, 2006

Filed:

Dec 6, 2005

Appl. No.:

11/295343

Inventors:

Steven Webb - Midland MI, US
Jared Austin - Greer SC, US
Stephen Sharp - Holly Springs NC, US
Ruediger Kesselmeier - Nattheim, DE

International Classification:

D01D 5/253

US Classification:

264172120, 264172150, 264172170, 264210800

Abstract:

A bonded web of multi-component strands that include a first polymeric component and a second polymeric component is capable of overcoming a number of problems associated with nonwoven webs including both stickiness and blocking. The first polymeric component and second polymeric component are arranged in substantially distinct zones extending longitudinally along at least a portion of a length of the strands which make up the web with the second component containing a zone constituting at least a portion of the peripheral surface of the strand. The first polymeric component also has an elasticity which is greater than that of the second polymer component. A process producing elastomeric spunbonded nonwoven fabrics which utilizes the activation by incremental stretching of the strands is also provided.

US Patent:

20060084339, Apr 20, 2006

Filed:

Dec 6, 2005

Appl. No.:

11/295286

Inventors:

Steven Webb - Midland MI, US
Jared Austin - Greer SC, US
Stephen Sharp - Holly Springs NC, US

International Classification:

D04H 3/00
D04H 3/14

US Classification:

442329000, 442361000, 442328000, 442409000, 442352000

Abstract:

A bonded web of multi-component strands that include a first polymeric component and a second polymeric component is capable of overcoming a number of problems associated with nonwoven webs including both stickiness and blocking. The first polymeric component and second polymeric component are arranged in substantially distinct zones extending longitudinally along at least a portion of a length of the strands which make up the web with the second component containing a zone constituting at least a portion of the peripheral surface of the strand. The first polymeric component also has an elasticity which is greater than that of the second polymer component. A process producing elastomeric spunbonded nonwoven fabrics which utilizes the activation by incremental stretching of the strands is also provided.