Allied Chemical Corporation

Alliedsignal Inc.

Allied Corporation

Maxwell C Hamlyn

Charles J Nelson

David Pendlebury

Wilbur L Stables

Anthony Michael Saich

Thomas H Luck

A process for production of a dimensionally stable drawn polyethylene terephthalate multifilament yarn having filaments of at least 2.5 denier per filament comprising the steps of:

Process for dimensionally stable polyester yarn

An apparatus for commingling yarn. The apparatus has an inner body having a yarn passageway with a diameter of about 1/4 inch to 5/16 inch. There are orifices through which a high pressure fluid such as air pass to the yarn passageway. The orifices have a diameter of about 0.060 to 0.80 inches.

Device having yarn passage of specified dimensions for interlacing

A low shrinkage, dimensionally stable, polyester fiber is produced by a process which involves conditions of continuously spinning and drawing filaments wherein the filaments are passed through a steam impinging draw point localizing jet (25) at a temperature of about 482.degree. C. to 580.degree. C. to thereby heat the filaments substantially immediately above their second order transition temperature. The low shrinkage polyester fibers are particularly useful in the preparation of tires and industrial products, including industrial belts, conveyor belts, and reinforced elastomeric structures.

Continuous spin-draw polyester process

A low shrinkage, dimensionally stable, polyester industrial fiber is produced by a process which involves conditions of continuously spinning and drawing filaments wherein the filaments are passed through a steam impinging draw point localizing jet (25) at a temperature of about 460.degree. C. to 580.degree. C. to thereby heat the filaments substantially immediately above their second order transition temperature. The low shrinkage polyester fibers are particularly useful in the preparation of industrial products, including industrial belts, conveyor belts, and reinforced elastomeric structures.

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Cary, NC, United States of America

Maxwell C Hamlyn