Perry H Lin

US Patent:

6589653, Jul 8, 2003

Filed:

Aug 8, 2001

Appl. No.:

09/924193

Inventors:

Perry Han-Cheng Lin - Canton GA

Assignee:

E. I. du Pont de Nemours and Company - Wilmington DE

International Classification:

D01F 600

US Classification:

428398, 428397, 428376, 428 92

Abstract:

A synthetic polymer filament is characterized by a four-sided void that extends centrally and axially through the filament. Each apex of the void extends toward the approximate midpoint of one side of the exterior configuration of the filament. The four-sided void has a modification ratio in the range from about 1. 2 to about 2. 0 and occupies from about five percent 5% to about thirty percent 30% of the cross sectional area of the filament. A spinneret plate for producing the thermoplastic synthetic polymer filament has a cluster of four orifices centered about a central point. Each orifice includes a generally isosceles triangle-shaped major portion from which extends a pair of legs, each leg of one orifice being spaced from the leg of an adjacent orifice to define a gap therebetween.

US Patent:

20060236466, Oct 26, 2006

Filed:

Feb 6, 2004

Appl. No.:

10/544037

Inventors:

Perry Lin - CANTON GA, US
Nitin Champaneria - Seaford DE, US

International Classification:

C11D 3/00

US Classification:

008115510

Abstract:

A method of manufacture of a rapid dyeing, deep dyeing, open structure polyamide yarn and to the yarn and to a fabric produced from the yarn includes the step of applying an aqueous finish to substantially all of the rapid dyeing, deep dyeing, open structure polyamide filaments. The aqueous finish consists essentially of a fluorosurfactant dissolved in water that is applied to bulked continuous filament yarn at an effective concentration level of preferably 150 to 600 parts per million by weight of flourine on yarn. The aqueous fluorosurfactant finish is applied at a point after texturizing and before windup.

US Patent:

60486155, Apr 11, 2000

Filed:

Jan 30, 1998

Appl. No.:

9/016384

Inventors:

Perry Han-Cheng Lin - Hixson TN

Assignee:

E. I. du Pont de Nemours and Company - Wilmington DE

International Classification:

D02G 200

US Classification:

428397

Abstract:

A synthetic polymer filament is characterized by a trilobal void that extends centrally and axially through the filament. Each apex of the void extends toward the approximate midpoint of one side of the exterior configuration of the filament. The trilobal void has a modification ratio in the range from about 1. 4 to about 3. 0 and occupies from about five percent (5%) to about thirty percent (30%) of the cross sectional area of the filament. At a given constant void percentage a decrease of modification ratio increases the degree of sparkle. A spinneret plate for producing the thermoplastic synthetic polymer filament has a cluster of three generally arrow-shaped orifices centered about a central point. Each orifice is defined by a first and a second outer leg joined together at a pointed end directed away from a central point of the cluster. Each orifice has a central leg extending from the jointure of the outer legs toward the central point of the cluster.

US Patent:

56164122, Apr 1, 1997

Filed:

Jun 11, 1996

Appl. No.:

8/661510

Inventors:

Perry H. Lin - Hixson TN

Assignee:

E. I. Du Pont de Nemours and Company - Wilmington DE

International Classification:

D07G 300

US Classification:

428373

Abstract:

Fine denier filaments having a high elongation at break of a blend polypropylene and polystyrene are made by forming an intimate blend using a twin screw extruder and then spinning the blend.