Hoechst Celanese Corporation

Celanese Gmbh

Fiber Industries, Inc.

Ronald L Griffith

F Holmes Simons

Nicolai A Favstritsky

Gerard Lees

The instant invention is directed to a drawn polyester yarn. This yarn is characterized by an initial secant modulus greater than 150 grams per denier/100%. The yarn may be further characterized by either a shrinkage of less than 8% or a tenacity of greater than 7.5 grams per denier. Alternatively, the yarn is characterized by a tenacity of at least 10 grams per denier, an initial modulus of at least 120 grams per denier/100% and a shrinkage of less than 8%.

Drawn polyester yarn having a high tenacity and high modulus and a low

A process for spinning an organic synthetic melt spinnable polymer includes the steps of: extruding the polymer through a spinneret; passing the filaments from the spinneret through an elongated zone; maintaining the filaments at a temperature above the glass transition temperature of the polymer within the zone; and thereafter converging the filaments. Alternatively, the process includes the steps of: extruding the polymer through a spinneret; providing an elongated zone having a length of at least 5 meters or means for controlling the temperature within said zone from a predetermined maximum to a predetermined minimum; passing the filaments through the zone; and thereafter converging the filaments.

Spinning process for producing high strength, high modulus, low

The invention provides partially oriented polyester yarn finishes capable of substantially reducing the level of broken filaments resulting from polyester yarn texturing. Finishes of the invention are a stable oil-in-water emulsion with the oil phase including a polyester yarn texturing lubricant. The emulsion finish has a pH of at least 9.0, preferably between about 10 and about 11.5.

Partially oriented polyester yarn emulsion finish with elevated pH

A method of reducing the number of free carboxyl end groups present in a fiber-forming polymer is given whereby to the polymer minor amounts of a low-boiling oxirane compound such as ethylene oxide are added.

Growing community of inventors

Charlotte, NC, United States of America

Ronald L Griffith