Shell Oil Comapny

Houston Slade Brown

Kailash C Dangayach

Hoe H Chuah

Charles Chiu-Hsiung Hwo

Paul Karol Casey

Donald R Kelsey

Eckhard Seidel

Fritz Wilhelm

Paul A Westbrook

Hans Reitz

Kathleen Suzanne Kiibler

Betty Marrou Scardino

Dieter Wiemer

Hansjorg Meise

Adriano Birosel Pangelinan

Michele Buscemi

A process for the production and for the winding of one polyester yarn, preferably multi-filament yarn, which comprises at least about 85 weight %, in relation to the total weight of the polyester yarn, of polytrimethylene terephthalate (PTT) wherein said process is characterized in that filaments of said polyester yarn is heat-treated, before it is wound on a bobbin, at a temperature in the range of about 70&#xb0; C. to about 180&#xb0; C. The method of accomplishing this is by heating the godets that are used in the spinning part of the process, preferably the last pair of godets, to relax the yarns so that the yarn package will not shrink significantly during storage and/or transportation. It is thus possible to obtain at least one PTT yarn package with long-term stability during storage and which is insensitive against elevated temperatures during storage and transport.

Process for making stable polytrimethylene terephthalate packages

Spin draw process of making partially oriented yarns from polytrimethylene terephthalate

Process for making high stretch and elastic knitted fabrics from polytrimethylene terephthalate

According to the invention, a polytrimethylene terephthalate is provided having 0.6 to less than 2 mole percent dipropylene glycol. Such compositions have a reduced tendency to generate acrolein when heated in air. These PTT polymer compositions exhibit improved and enhanced dyeability as compared to conventional PTT made by the DMT process and the TPA polycondensation/solid state polymerization processes.

Optimum dipropylene glycol content polytrimethylene terephthalate compositions

Fibers, or articles prepared therefrom, of linear alternating polymer of carbon monoxide and at least one ethylenically unsaturated hydrocarbon are effectively dyed by contacting the fibers in aqueous dyebath under mild dyeing conditions in the substantial absence of a dye carrier. The dyed materials are useful in apparel fabrics.

Dyeing of polyketone fiber

A fiber prepared from a linear alternating polymer of carbon monoxide and at least one ethylenically unsaturated hydrocarbon, and a process for preparing this fiber.

Polyketone fibers

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Houston, TX, United States of America

Houston Slade Brown