Methods of making pigmented filaments

US6416859B1 · kind B1 · utility

Assignee

• BASF SE

Inventors

• Donald Caswell · Anderson, US
• Frank R. Jones · Ellensburg, US
• David B. Ledford · Arden, US
• Stanley A. McIntosh · Greensboro, US
• Gary W. Shore · Bay City, US
• Karl H. Buchanan · Arden, US
• Wayne S. Stanko · Clemson, US
• G. Daniel Gasperson · Candler, US
• Charles F. Helms, Jr. · Florence, US

Key dates

• Filing date: Oct 17, 2000
• Grant date: Jul 9, 2002
• Expiry date: Oct 17, 2020

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/2915
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

Polymeric compositions include a nonaqueous additive system having dispersant-coated pigments physically dispersed in a liquid nonaqueous polymeric carrier which may be added directly to a melt flow of a polymeric host material. The additive system employed in the polymeric systems is most preferably in the form of a particulate paste which can be added in metered amounts (dosed) to a melt flow of the polymeric host material prior to being spun into filaments. By providing a number of additive systems having a number of different additive attributes, and controllably dosing one or more into the melt flow of host polymeric material, shaped objects of the polymeric material (e.g., melt-spun filaments) having different additive attributes may be produced on a continuous basis without shutting down the shaping operation.