E.i. Dupont De Nemours and Company

Sonoco Development Incorporated

Ismael A Hernandez

James M Howell

Geoffrey David Hietpas

Brian P Couchey

William J Jones, Jr

Darren Scott Quinn

Claudia Schultze

John F Whitehead

Clifford A Bellum

Richard K Mims

David L Rykard

Christoph Reichrez

Bellum A Clifford

A paperboard core is described above that is designed to receive a yarn wound thereon, such as an elastomeric yarn that relies on friction for proper winding of the yarn onto the core. In particular, the core includes a clay-coated paper outer ply which is capable of providing direct frictional engagement of the core with the yarn, such that the yarn is windable on the core via direct contact between the clay-coated outer ply and the yarn. In this way, there is no need to use a film on the outer surface of the core in order to obtain the desired frictional properties that will result in proper winding of the yarn onto the core.

Core for winding elastomeric yarns

A support for mounting a paperboard yarn core on a spindle assembly includes a proximal-end support member for supporting a proximal end of the core and engaging it in a substantially non-slip manner, and a distal-end support member for supporting a distal end of the core. The proximal-end support member is configured to be mounted on a hub of the spindle assembly. The support members locate the core substantially coaxially with respect to a rotational axis of the spindle assembly. The proximal-end support member is configured to automatically prevent or minimize slippage of the core with respect to the support member both in acceleration and deceleration or braking of the spindle assembly.

Paperboard core spindle support for yarn packages

The invention relates to webs or batts including polytrimethylene terephthalate crimped staple fibers and fiberfill products comprising such webs and batts, as well as the processes of making the staple fibers, webs, batts and fiberfill products. According to the preferred process of making a web or batt, polytrimethylene terephthalate staple fibers, containing polytrimethylene terephthalate is melt spun at a temperature of 245-285&#xb0; C. into filaments. The filaments are quenched, drawn and mechanically crimped to a crimp level of 8-30 crimps per inch (3-12 crimps/cm). The crimped filaments are relaxed at a temperature of 50-130&#xb0; C. and then cut into staple fibers having a length of about 0.2-6 inches (about 0.5-about 15 cm). A web is formed by garnetting or carding the staple fibers and is optionally cross-lapped to form a batt. A fiberfill product is prepared with the web or batt.

Process of making web or fiberfill from polytrimethylene terephthalate staple fibers

Poly(trimethylene terephthalate) tetrachannel cross-section staple fibers, as well as yarns, fiberfill webs, batts and products, and fabrics made therewith. Also, the process of making such staple fibers, yarns, fiberfill webs, batts and products, and fabrics.

Process for preparing poly(trimethylene terephthalate) tetrachannel cross-section staple fiber

A process of making polytrimethylene terephthalate staple fibers, including (a) providing polytrimethylene terephthalate, (b) melt spinning the melted polytrimethylene terephthalate at a temperature of 245-285&deg; C. into filaments, (c) quenching the filaments, (d) drawing the quenched filaments, (e) crimping the drawn filaments using a mechanical crimper at a crimp level of 8-30 crimps per inch (3-12 crimps/cm), (f) relaxing the crimped filaments at a temperature of 50-120&deg; C., and (g) cutting the relaxed filaments into staple fibers having a length of about 0.2-6 inches (about 0.5-about 15 cm), and polytrimethylene terephthalate staple fibers, yarns and fabrics. Further, a process of optimizing the crimp take-up of a polytrimethylene terephthalate staple fiber including determining the relationship between denier and crimp take-up and manufacturing staple fibers having a denier selected based upon that determination.

Process for making poly(trimethylene terephthalate) staple fibers

Poly(trimethylene terephthalate) tetrachannel cross-section staple fiber

Synthetic fibers that have a round cross-section and three round longitudinal voids.

Synthetic fiber cross-section

Bicomponent polyester fibers that have 'spiral crimp' on account of a difference in chain-branched content of the polyester polymers of the components. Such bicomponent fibers are preferably hollow and may be slickened, such as for use as filling material for pillows or other filled articles.

Bicomponent polyester fibers

Pillows and other filled articles are filled with bicomponent polyester fibers that have 'spiral crimp' on account of a difference in chain-branched content of the polyester polymers of the components. Such bicomponent fibers are preferably novel 'spiral crimp' bicomponent fibers that are hollow and/or are slickened.

Pillows and other filled articles and in their filling materials

Fiberfill and/or multi-void fibers are identified and/or differentiated by one or more voids being partially filled with a differentiating characteristic that is a protuberance of characterizing polymer material. This material may be the same or different from that of the rest of the fiber. The protuberance is provided by appropriate adjustment of the spinning capillary, i.e., during extrusion to form the fiber.

Fiber identification

Relating to fiber identification

Hollow fibers are differentiated by their void being partially filled with a differentiating characteristic that is a protuberance of characterizing polymer material. This material may be the same or different from that of the rest of the fiber. The protuberance is provided by appropriate adjustment of the spinning capillary, i.e., during extrusion to form the fiber.

Relating to hollow fiber identification

Hollow fiber identification

Pillows and other filled articles are filled with bicomponent polyester fibers that have 'spiral crimp' on account of a difference in chain-branched content of the polyester polymers of the components. Such bicomponent fibers are preferably novel hollow 'spiral crimp' bicomponent fibers.

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Winterville, NC, United States of America

Ismael A Hernandez