E.i. Dupont De Nemours and Company

Arun Pal Aneja

Benjamin H Knox

James H Drew

Hans R Frankfort

Stephen B Johnson

Robert J Collins

Elmer E Most, Jr

Adrian C Snyder

David George Bennie

Frederick K Mallon

Harvey G Anderson

Robert Kenneth Roop

Curtis E Moran, Jr

Robert Lee Edmundson

This invention provides corrugated fiberfill structures with improved properties and processes for making the same. This invention further provides articles made from the improved corrugated fiberfill structures of the present invention.

Corrugated fiberfill structures for filling and insulation

Novel spinnerets for producing multi-grooved filaments have a row of apertures connected by slots that correspond to the grooves in the periphery of the resulting filaments.

Spinnerets with orifices for improved filament cross-sections

Simultaneous drawing of mixed polyester filaments is improved by use of chain-branched polyester for the polymer from which the polyester filaments are spun.

Drawing of polyester filaments

New copolyester composition that provides excellent filament spinning and mill/yarn processing of staple fiber into fabrics having combination of excellent pilling performance as well as aesthetics and tactility ('hand'). Preferred fibers have non-round cross-sections, especially multi-grooved and scalloped-oval cross-sections that provide fabrics having outstanding comfort qualities of moisture-management, dryness and comfort, as well as minimal pilling.

Low pill copolyester

Comfort properties of fibers of longitudinally-grooved fibers of scalloped-oval cross-section are improved by providing such fibers as a mixture of different dpf and using a cationic-dyeable alkali metal sulfonate isophthalate salt copolyester that is also modified with a chain-brancher so that the filaments of different dpf can be drawn simultaneously.

Comfort by mixing deniers

Fabrics of wool and/or polyester fibers

New polyester composition for new polyester staple fiber that provides fabrics having a combination of excellent pilling performance, aesthetics and tactility ('hand'). Preferred fibers have non-round cross-sections that are retained, especially such non-round cross-sections having multi-grooved scalloped-oval cross-sections that provide fabrics having outstanding comfort qualities of moisture-management, dryness and comfort, along with minimal pilling.

Low pill polyester

Tow that is suitable for processing on a worsted or wollen system and that consists essentially of continuous polyester filaments that have a scalloped-oval cross-section with grooves or channels that run along the length of the filaments. Such polyester tows provide improved processing on the worsted system to provide spun yarns of polyester and blends with wool, and downstream articles, such as fabrics and garments.

Polyester tows

A new polyester fiber is provided with an improved scalloped-oval cross-section, such as provides advantages in comfort in downstream products, such as fabrics and garments, and in mill-processing, especially in the form of tows that are suitable for processing on the worsted or woollen systems, and their corresponding slivers.

Polyester filaments and tows

Tow that is suitable for processing on a worsted or woollen system consists essentially of continuous polyester filaments that are a mixture of filaments of higher denier and of lower denier and that have a scalloped-oval or other cross-section that is of generally oval shape, but with grooves or channels that run along the length of the filaments. Such polyester tows provide improved processing on the worsted system to provide spun yarns of polyester and blends with wool, and downstream articles, such as fabrics and garments.

Polyester tow

A post-coalescence melt-spinning process for preparing fine undrawn hollow polyester filaments having excellent mechanical quality and uniformity at high speeds (2-5 km/min) involving selection of polymer viscosity and spinning conditions, whereby the void content of the resulting new undrawn filaments is essentially maintained or increased on cold-drawing or hot-drawing with or without post heat treatment, and the new fine hollow polyester filaments obtained thereby.

Process for polyester fine hollow filaments

Hollow polyester undrawn filaments having excellent mechanical quality and uniformity are prepared by a simplified post-coalescence melt spinning process at speeds of e.g. 2-5 km/min by selection of polymer and spinning conditions whereby the void content of the undrawn filaments can be essentially maintained or even increased when drawn cold or hot, with or without post heat-treatment.

Growing community of inventors

Greenville, NC, United States of America

Arun Pal Aneja