A novelty yarn having a pronounced variation in linear density is obtained by passing at least one multifilament yarn through a fluid tangling zone and by alternatingly and mechanically tensioning and relaxing the yarn within the tangling zone. The yarn comprises a wax coating.

A blended fibrous structure comprising synthetic filaments or fibers having a high electrical resistance together with extruded synthetic polyester or polyamide filament, having an extension to break of at least 200 percent, containing between 5 to 20 percent by weight inclusive of conductive carbon black.

Coated yarns suitable for use in woven piled fabrics comprising a synthetic organic polymeric base yarn, such as polyolefin, polyamide or polyester yarns, coated with a hot-melt synthetic resin adhesive composition comprising copolymers of ethylene with a vinyl ester of a carboxylic acid or with an alkyl acrylate or methacrylate, and wax. Process for the preparation of and woven piled fabrics made of such coated yarns are also provided.

Yarn relax process wherein a yarn is tensioned and forwarded by means of an unheated fluid device to a hot zone wherein tension falls.

Cord suitable for conveyor belts and tire breaker belts comprises a plurality of individually twisted synthetic macrofilaments twisted together, each macrofilament having a denier of at least 100.

In a method and a device for clearing yarn, properties of the yarn are acquired and used to determine a yarn defect density profile. Yarn defects to be removed are defined by means of an adjustable clearing limit which is based on the density profile. In order to provide an optimum adjustment as frequently as possible, the clearing limit is automatically adjusted on the basis of the acquired properties in a control loop.

The invention pertains to a finish composition for treating yarns comprising a mixture of silicone oil emulsion and a wax emulsion wherein the amount of silicone oil is 0.5 to 30 wt. %, the amount of wax is 1.5 to 45 wt. %, the total of silicone oil and wax is 2 to 60 wt. %, and the ratio silicone oil:wax is <1, and to a yarn comprising the same. Preferably, the yarn is aramid yarn.

The invention is a side by side nylon/nylon bicomponent yarn with desirable stretch and recovery and retractive force characteristics, and the process for manufacturing this yarn.

An improved load leveling yarn has a force-displacement profile that maintains desirable properties of previously known yarns (as exemplified in U.S. Pat. No. 5,830,811), but exhibits a lower elongation at a stress that is greater than the IBS but less than or equal to 1.8 grams/denier. Especially preferred yarns are produced from PET with an IV of greater than 0.9 and epsilon caprolactone (at a ratio of about 90:10) under copolymerization conditions that allow reaction of at least 95% of the ad...

Apparatus for relaxing a running yarn composed of thermoplastic polymer material comprising a yarn supply means, a fluid tension device having a yarn passageway, means for introducing a gaseous fluid under pressure to the fluid tensioning device and a heating zone comprising an externally heated divergent passageway of a cross section steadily increasing from that of the yarn passageway.