Hoechst Celanese Corporation

Celanese Acetate Limited

Cheryl F Corallo

Robert Bruce Sandor

Ralph S Blake

Robina M C Hogan

Derrick B McKie

William S Sanderson

Gary B Ellison

David O Kutscher

Donald T Stilwell

Mark E Scarborough

Philip I L Caenen

Ramiro Montez Diaz

Ronald Nivins

Heather L Clarkson

Philip IL Caenen

Robina MC Hogan

In the manufacture of cellulose ester fibers, a dope is extruded into filaments. Extrusion occurs in an elongated cabinet having an outlet for the filaments. The filaments are taken up after exiting the outlet. The filaments are lubricated at the outlet of the cabinet.

Manufacture of cellulose ester filaments: lubrication in the spinning cabinet

A cigarette filter tow is a cellulose acetate tow having a high uncrimping energy (UCE) and a low fly. In one embodiment, the average UCE is greater than 280 and the average fly is less than or equal to 0.030 grams per 30 minutes. In another embodiment, the average UCE is greater than 265 and the average fly is less than or equal to 0.023 grams per 30 minutes. In another embodiment, the average UCE is greater than 250 and the average fly is less than or equal to 0.017 grams per 30 minutes.

Cellulose acetate tow and method of making same

An extrusion blow molding process for a heat-treated, liquid crystalline polymer is provided. By the process, molten polymer having improved melt strength, is vertically extruded downward into space through a parison-forming, annular gap. Sag resistant parisons are formed. Beneficially, the parisons may be formed periodically. Advantageously, large-sized parts or structures may be produced.

Extrusion blow molding of thermotropic liquid crystalline polymers

An extrusion blow molding process for a filled, liquid crystalline polymer is provided. By the process, molten polymer having improved melt strength, is vertically extruded downward into space through a parison-forming, annular gap. Sag resistant parisons are formed. Beneficially, the parisons may be formed periodically. Advantageously, large-sized parts or structures may be produced.

Extrusion blow molding of filled liquid crystal polymers

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Charlotte, NC, United States of America

Cheryl F Corallo